1/* BFD backend for SunOS binaries. 2 Copyright 1990, 1991, 1992, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 3 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 4 Free Software Foundation, Inc. 5 Written by Cygnus Support. 6 7 This file is part of BFD, the Binary File Descriptor library. 8 9 This program is free software; you can redistribute it and/or modify 10 it under the terms of the GNU General Public License as published by 11 the Free Software Foundation; either version 3 of the License, or 12 (at your option) any later version. 13 14 This program is distributed in the hope that it will be useful, 15 but WITHOUT ANY WARRANTY; without even the implied warranty of 16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 GNU General Public License for more details. 18 19 You should have received a copy of the GNU General Public License 20 along with this program; if not, write to the Free Software 21 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, 22 MA 02110-1301, USA. */ 23 24#define TARGETNAME "a.out-sunos-big" 25 26/* Do not "beautify" the CONCAT* macro args. Traditional C will not 27 remove whitespace added here, and thus will fail to concatenate 28 the tokens. */ 29#define MY(OP) CONCAT2 (sunos_big_,OP) 30 31#include "bfd.h" 32#include "bfdlink.h" 33#include "libaout.h" 34 35/* ??? Where should this go? */ 36#define MACHTYPE_OK(mtype) \ 37 (((mtype) == M_SPARC && bfd_lookup_arch (bfd_arch_sparc, 0) != NULL) \ 38 || ((mtype) == M_SPARCLET \ 39 && bfd_lookup_arch (bfd_arch_sparc, bfd_mach_sparc_sparclet) != NULL) \ 40 || ((mtype) == M_SPARCLITE_LE \ 41 && bfd_lookup_arch (bfd_arch_sparc, bfd_mach_sparc_sparclet) != NULL) \ 42 || (((mtype) == M_UNKNOWN || (mtype) == M_68010 || (mtype) == M_68020) \ 43 && bfd_lookup_arch (bfd_arch_m68k, 0) != NULL)) 44 45#define MY_get_dynamic_symtab_upper_bound sunos_get_dynamic_symtab_upper_bound 46#define MY_canonicalize_dynamic_symtab sunos_canonicalize_dynamic_symtab 47#define MY_get_synthetic_symtab _bfd_nodynamic_get_synthetic_symtab 48#define MY_get_dynamic_reloc_upper_bound sunos_get_dynamic_reloc_upper_bound 49#define MY_canonicalize_dynamic_reloc sunos_canonicalize_dynamic_reloc 50#define MY_bfd_link_hash_table_create sunos_link_hash_table_create 51#define MY_add_dynamic_symbols sunos_add_dynamic_symbols 52#define MY_add_one_symbol sunos_add_one_symbol 53#define MY_link_dynamic_object sunos_link_dynamic_object 54#define MY_write_dynamic_symbol sunos_write_dynamic_symbol 55#define MY_check_dynamic_reloc sunos_check_dynamic_reloc 56#define MY_finish_dynamic_link sunos_finish_dynamic_link 57 58static bfd_boolean sunos_add_dynamic_symbols (bfd *, struct bfd_link_info *, struct external_nlist **, bfd_size_type *, char **); 59static bfd_boolean sunos_add_one_symbol (struct bfd_link_info *, bfd *, const char *, flagword, asection *, bfd_vma, const char *, bfd_boolean, bfd_boolean, struct bfd_link_hash_entry **); 60static bfd_boolean sunos_link_dynamic_object (struct bfd_link_info *, bfd *); 61static bfd_boolean sunos_write_dynamic_symbol (bfd *, struct bfd_link_info *, struct aout_link_hash_entry *); 62static bfd_boolean sunos_check_dynamic_reloc (struct bfd_link_info *, bfd *, asection *, struct aout_link_hash_entry *, void *, bfd_byte *, bfd_boolean *, bfd_vma *); 63static bfd_boolean sunos_finish_dynamic_link (bfd *, struct bfd_link_info *); 64static struct bfd_link_hash_table *sunos_link_hash_table_create (bfd *); 65static long sunos_get_dynamic_symtab_upper_bound (bfd *); 66static long sunos_canonicalize_dynamic_symtab (bfd *, asymbol **); 67static long sunos_get_dynamic_reloc_upper_bound (bfd *); 68static long sunos_canonicalize_dynamic_reloc (bfd *, arelent **, asymbol **); 69 70/* Include the usual a.out support. */ 71#include "aoutf1.h" 72 73/* The SunOS 4.1.4 /usr/include/locale.h defines valid as a macro. */ 74#undef valid 75 76/* SunOS shared library support. We store a pointer to this structure 77 in obj_aout_dynamic_info (abfd). */ 78 79struct sunos_dynamic_info 80{ 81 /* Whether we found any dynamic information. */ 82 bfd_boolean valid; 83 /* Dynamic information. */ 84 struct internal_sun4_dynamic_link dyninfo; 85 /* Number of dynamic symbols. */ 86 unsigned long dynsym_count; 87 /* Read in nlists for dynamic symbols. */ 88 struct external_nlist *dynsym; 89 /* asymbol structures for dynamic symbols. */ 90 aout_symbol_type *canonical_dynsym; 91 /* Read in dynamic string table. */ 92 char *dynstr; 93 /* Number of dynamic relocs. */ 94 unsigned long dynrel_count; 95 /* Read in dynamic relocs. This may be reloc_std_external or 96 reloc_ext_external. */ 97 void * dynrel; 98 /* arelent structures for dynamic relocs. */ 99 arelent *canonical_dynrel; 100}; 101 102/* The hash table of dynamic symbols is composed of two word entries. 103 See include/aout/sun4.h for details. */ 104 105#define HASH_ENTRY_SIZE (2 * BYTES_IN_WORD) 106 107/* Read in the basic dynamic information. This locates the __DYNAMIC 108 structure and uses it to find the dynamic_link structure. It 109 creates and saves a sunos_dynamic_info structure. If it can't find 110 __DYNAMIC, it sets the valid field of the sunos_dynamic_info 111 structure to FALSE to avoid doing this work again. */ 112 113static bfd_boolean 114sunos_read_dynamic_info (bfd *abfd) 115{ 116 struct sunos_dynamic_info *info; 117 asection *dynsec; 118 bfd_vma dynoff; 119 struct external_sun4_dynamic dyninfo; 120 unsigned long dynver; 121 struct external_sun4_dynamic_link linkinfo; 122 bfd_size_type amt; 123 124 if (obj_aout_dynamic_info (abfd) != NULL) 125 return TRUE; 126 127 if ((abfd->flags & DYNAMIC) == 0) 128 { 129 bfd_set_error (bfd_error_invalid_operation); 130 return FALSE; 131 } 132 133 amt = sizeof (struct sunos_dynamic_info); 134 info = bfd_zalloc (abfd, amt); 135 if (!info) 136 return FALSE; 137 info->valid = FALSE; 138 info->dynsym = NULL; 139 info->dynstr = NULL; 140 info->canonical_dynsym = NULL; 141 info->dynrel = NULL; 142 info->canonical_dynrel = NULL; 143 obj_aout_dynamic_info (abfd) = (void *) info; 144 145 /* This code used to look for the __DYNAMIC symbol to locate the dynamic 146 linking information. 147 However this inhibits recovering the dynamic symbols from a 148 stripped object file, so blindly assume that the dynamic linking 149 information is located at the start of the data section. 150 We could verify this assumption later by looking through the dynamic 151 symbols for the __DYNAMIC symbol. */ 152 if ((abfd->flags & DYNAMIC) == 0) 153 return TRUE; 154 if (! bfd_get_section_contents (abfd, obj_datasec (abfd), (void *) &dyninfo, 155 (file_ptr) 0, 156 (bfd_size_type) sizeof dyninfo)) 157 return TRUE; 158 159 dynver = GET_WORD (abfd, dyninfo.ld_version); 160 if (dynver != 2 && dynver != 3) 161 return TRUE; 162 163 dynoff = GET_WORD (abfd, dyninfo.ld); 164 165 /* dynoff is a virtual address. It is probably always in the .data 166 section, but this code should work even if it moves. */ 167 if (dynoff < bfd_get_section_vma (abfd, obj_datasec (abfd))) 168 dynsec = obj_textsec (abfd); 169 else 170 dynsec = obj_datasec (abfd); 171 dynoff -= bfd_get_section_vma (abfd, dynsec); 172 if (dynoff > dynsec->size) 173 return TRUE; 174 175 /* This executable appears to be dynamically linked in a way that we 176 can understand. */ 177 if (! bfd_get_section_contents (abfd, dynsec, (void *) &linkinfo, 178 (file_ptr) dynoff, 179 (bfd_size_type) sizeof linkinfo)) 180 return TRUE; 181 182 /* Swap in the dynamic link information. */ 183 info->dyninfo.ld_loaded = GET_WORD (abfd, linkinfo.ld_loaded); 184 info->dyninfo.ld_need = GET_WORD (abfd, linkinfo.ld_need); 185 info->dyninfo.ld_rules = GET_WORD (abfd, linkinfo.ld_rules); 186 info->dyninfo.ld_got = GET_WORD (abfd, linkinfo.ld_got); 187 info->dyninfo.ld_plt = GET_WORD (abfd, linkinfo.ld_plt); 188 info->dyninfo.ld_rel = GET_WORD (abfd, linkinfo.ld_rel); 189 info->dyninfo.ld_hash = GET_WORD (abfd, linkinfo.ld_hash); 190 info->dyninfo.ld_stab = GET_WORD (abfd, linkinfo.ld_stab); 191 info->dyninfo.ld_stab_hash = GET_WORD (abfd, linkinfo.ld_stab_hash); 192 info->dyninfo.ld_buckets = GET_WORD (abfd, linkinfo.ld_buckets); 193 info->dyninfo.ld_symbols = GET_WORD (abfd, linkinfo.ld_symbols); 194 info->dyninfo.ld_symb_size = GET_WORD (abfd, linkinfo.ld_symb_size); 195 info->dyninfo.ld_text = GET_WORD (abfd, linkinfo.ld_text); 196 info->dyninfo.ld_plt_sz = GET_WORD (abfd, linkinfo.ld_plt_sz); 197 198 /* Reportedly the addresses need to be offset by the size of the 199 exec header in an NMAGIC file. */ 200 if (adata (abfd).magic == n_magic) 201 { 202 unsigned long exec_bytes_size = adata (abfd).exec_bytes_size; 203 204 info->dyninfo.ld_need += exec_bytes_size; 205 info->dyninfo.ld_rules += exec_bytes_size; 206 info->dyninfo.ld_rel += exec_bytes_size; 207 info->dyninfo.ld_hash += exec_bytes_size; 208 info->dyninfo.ld_stab += exec_bytes_size; 209 info->dyninfo.ld_symbols += exec_bytes_size; 210 } 211 212 /* The only way to get the size of the symbol information appears to 213 be to determine the distance between it and the string table. */ 214 info->dynsym_count = ((info->dyninfo.ld_symbols - info->dyninfo.ld_stab) 215 / EXTERNAL_NLIST_SIZE); 216 BFD_ASSERT (info->dynsym_count * EXTERNAL_NLIST_SIZE 217 == (unsigned long) (info->dyninfo.ld_symbols 218 - info->dyninfo.ld_stab)); 219 220 /* Similarly, the relocs end at the hash table. */ 221 info->dynrel_count = ((info->dyninfo.ld_hash - info->dyninfo.ld_rel) 222 / obj_reloc_entry_size (abfd)); 223 BFD_ASSERT (info->dynrel_count * obj_reloc_entry_size (abfd) 224 == (unsigned long) (info->dyninfo.ld_hash 225 - info->dyninfo.ld_rel)); 226 227 info->valid = TRUE; 228 229 return TRUE; 230} 231 232/* Return the amount of memory required for the dynamic symbols. */ 233 234static long 235sunos_get_dynamic_symtab_upper_bound (bfd *abfd) 236{ 237 struct sunos_dynamic_info *info; 238 239 if (! sunos_read_dynamic_info (abfd)) 240 return -1; 241 242 info = (struct sunos_dynamic_info *) obj_aout_dynamic_info (abfd); 243 if (! info->valid) 244 { 245 bfd_set_error (bfd_error_no_symbols); 246 return -1; 247 } 248 249 return (info->dynsym_count + 1) * sizeof (asymbol *); 250} 251 252/* Read the external dynamic symbols. */ 253 254static bfd_boolean 255sunos_slurp_dynamic_symtab (bfd *abfd) 256{ 257 struct sunos_dynamic_info *info; 258 bfd_size_type amt; 259 260 /* Get the general dynamic information. */ 261 if (obj_aout_dynamic_info (abfd) == NULL) 262 { 263 if (! sunos_read_dynamic_info (abfd)) 264 return FALSE; 265 } 266 267 info = (struct sunos_dynamic_info *) obj_aout_dynamic_info (abfd); 268 if (! info->valid) 269 { 270 bfd_set_error (bfd_error_no_symbols); 271 return FALSE; 272 } 273 274 /* Get the dynamic nlist structures. */ 275 if (info->dynsym == NULL) 276 { 277 amt = (bfd_size_type) info->dynsym_count * EXTERNAL_NLIST_SIZE; 278 info->dynsym = bfd_alloc (abfd, amt); 279 if (info->dynsym == NULL && info->dynsym_count != 0) 280 return FALSE; 281 if (bfd_seek (abfd, (file_ptr) info->dyninfo.ld_stab, SEEK_SET) != 0 282 || bfd_bread ((void *) info->dynsym, amt, abfd) != amt) 283 { 284 if (info->dynsym != NULL) 285 { 286 bfd_release (abfd, info->dynsym); 287 info->dynsym = NULL; 288 } 289 return FALSE; 290 } 291 } 292 293 /* Get the dynamic strings. */ 294 if (info->dynstr == NULL) 295 { 296 amt = info->dyninfo.ld_symb_size; 297 info->dynstr = bfd_alloc (abfd, amt); 298 if (info->dynstr == NULL && info->dyninfo.ld_symb_size != 0) 299 return FALSE; 300 if (bfd_seek (abfd, (file_ptr) info->dyninfo.ld_symbols, SEEK_SET) != 0 301 || bfd_bread ((void *) info->dynstr, amt, abfd) != amt) 302 { 303 if (info->dynstr != NULL) 304 { 305 bfd_release (abfd, info->dynstr); 306 info->dynstr = NULL; 307 } 308 return FALSE; 309 } 310 } 311 312 return TRUE; 313} 314 315/* Read in the dynamic symbols. */ 316 317static long 318sunos_canonicalize_dynamic_symtab (bfd *abfd, asymbol **storage) 319{ 320 struct sunos_dynamic_info *info; 321 unsigned long i; 322 323 if (! sunos_slurp_dynamic_symtab (abfd)) 324 return -1; 325 326 info = (struct sunos_dynamic_info *) obj_aout_dynamic_info (abfd); 327 328#ifdef CHECK_DYNAMIC_HASH 329 /* Check my understanding of the dynamic hash table by making sure 330 that each symbol can be located in the hash table. */ 331 { 332 bfd_size_type table_size; 333 bfd_byte *table; 334 bfd_size_type i; 335 336 if (info->dyninfo.ld_buckets > info->dynsym_count) 337 abort (); 338 table_size = info->dyninfo.ld_stab - info->dyninfo.ld_hash; 339 table = bfd_malloc (table_size); 340 if (table == NULL && table_size != 0) 341 abort (); 342 if (bfd_seek (abfd, (file_ptr) info->dyninfo.ld_hash, SEEK_SET) != 0 343 || bfd_bread ((void *) table, table_size, abfd) != table_size) 344 abort (); 345 for (i = 0; i < info->dynsym_count; i++) 346 { 347 unsigned char *name; 348 unsigned long hash; 349 350 name = ((unsigned char *) info->dynstr 351 + GET_WORD (abfd, info->dynsym[i].e_strx)); 352 hash = 0; 353 while (*name != '\0') 354 hash = (hash << 1) + *name++; 355 hash &= 0x7fffffff; 356 hash %= info->dyninfo.ld_buckets; 357 while (GET_WORD (abfd, table + hash * HASH_ENTRY_SIZE) != i) 358 { 359 hash = GET_WORD (abfd, 360 table + hash * HASH_ENTRY_SIZE + BYTES_IN_WORD); 361 if (hash == 0 || hash >= table_size / HASH_ENTRY_SIZE) 362 abort (); 363 } 364 } 365 free (table); 366 } 367#endif /* CHECK_DYNAMIC_HASH */ 368 369 /* Get the asymbol structures corresponding to the dynamic nlist 370 structures. */ 371 if (info->canonical_dynsym == NULL) 372 { 373 bfd_size_type size; 374 bfd_size_type strsize = info->dyninfo.ld_symb_size; 375 376 size = (bfd_size_type) info->dynsym_count * sizeof (aout_symbol_type); 377 info->canonical_dynsym = bfd_alloc (abfd, size); 378 if (info->canonical_dynsym == NULL && info->dynsym_count != 0) 379 return -1; 380 381 if (! aout_32_translate_symbol_table (abfd, info->canonical_dynsym, 382 info->dynsym, 383 (bfd_size_type) info->dynsym_count, 384 info->dynstr, strsize, TRUE)) 385 { 386 if (info->canonical_dynsym != NULL) 387 { 388 bfd_release (abfd, info->canonical_dynsym); 389 info->canonical_dynsym = NULL; 390 } 391 return -1; 392 } 393 } 394 395 /* Return pointers to the dynamic asymbol structures. */ 396 for (i = 0; i < info->dynsym_count; i++) 397 *storage++ = (asymbol *) (info->canonical_dynsym + i); 398 *storage = NULL; 399 400 return info->dynsym_count; 401} 402 403/* Return the amount of memory required for the dynamic relocs. */ 404 405static long 406sunos_get_dynamic_reloc_upper_bound (bfd *abfd) 407{ 408 struct sunos_dynamic_info *info; 409 410 if (! sunos_read_dynamic_info (abfd)) 411 return -1; 412 413 info = (struct sunos_dynamic_info *) obj_aout_dynamic_info (abfd); 414 if (! info->valid) 415 { 416 bfd_set_error (bfd_error_no_symbols); 417 return -1; 418 } 419 420 return (info->dynrel_count + 1) * sizeof (arelent *); 421} 422 423/* Read in the dynamic relocs. */ 424 425static long 426sunos_canonicalize_dynamic_reloc (bfd *abfd, arelent **storage, asymbol **syms) 427{ 428 struct sunos_dynamic_info *info; 429 unsigned long i; 430 bfd_size_type size; 431 432 /* Get the general dynamic information. */ 433 if (obj_aout_dynamic_info (abfd) == NULL) 434 { 435 if (! sunos_read_dynamic_info (abfd)) 436 return -1; 437 } 438 439 info = (struct sunos_dynamic_info *) obj_aout_dynamic_info (abfd); 440 if (! info->valid) 441 { 442 bfd_set_error (bfd_error_no_symbols); 443 return -1; 444 } 445 446 /* Get the dynamic reloc information. */ 447 if (info->dynrel == NULL) 448 { 449 size = (bfd_size_type) info->dynrel_count * obj_reloc_entry_size (abfd); 450 info->dynrel = bfd_alloc (abfd, size); 451 if (info->dynrel == NULL && size != 0) 452 return -1; 453 if (bfd_seek (abfd, (file_ptr) info->dyninfo.ld_rel, SEEK_SET) != 0 454 || bfd_bread ((void *) info->dynrel, size, abfd) != size) 455 { 456 if (info->dynrel != NULL) 457 { 458 bfd_release (abfd, info->dynrel); 459 info->dynrel = NULL; 460 } 461 return -1; 462 } 463 } 464 465 /* Get the arelent structures corresponding to the dynamic reloc 466 information. */ 467 if (info->canonical_dynrel == NULL) 468 { 469 arelent *to; 470 471 size = (bfd_size_type) info->dynrel_count * sizeof (arelent); 472 info->canonical_dynrel = bfd_alloc (abfd, size); 473 if (info->canonical_dynrel == NULL && info->dynrel_count != 0) 474 return -1; 475 476 to = info->canonical_dynrel; 477 478 if (obj_reloc_entry_size (abfd) == RELOC_EXT_SIZE) 479 { 480 struct reloc_ext_external *p; 481 struct reloc_ext_external *pend; 482 483 p = (struct reloc_ext_external *) info->dynrel; 484 pend = p + info->dynrel_count; 485 for (; p < pend; p++, to++) 486 NAME (aout, swap_ext_reloc_in) (abfd, p, to, syms, 487 (bfd_size_type) info->dynsym_count); 488 } 489 else 490 { 491 struct reloc_std_external *p; 492 struct reloc_std_external *pend; 493 494 p = (struct reloc_std_external *) info->dynrel; 495 pend = p + info->dynrel_count; 496 for (; p < pend; p++, to++) 497 NAME (aout, swap_std_reloc_in) (abfd, p, to, syms, 498 (bfd_size_type) info->dynsym_count); 499 } 500 } 501 502 /* Return pointers to the dynamic arelent structures. */ 503 for (i = 0; i < info->dynrel_count; i++) 504 *storage++ = info->canonical_dynrel + i; 505 *storage = NULL; 506 507 return info->dynrel_count; 508} 509 510/* Code to handle linking of SunOS shared libraries. */ 511 512/* A SPARC procedure linkage table entry is 12 bytes. The first entry 513 in the table is a jump which is filled in by the runtime linker. 514 The remaining entries are branches back to the first entry, 515 followed by an index into the relocation table encoded to look like 516 a sethi of %g0. */ 517 518#define SPARC_PLT_ENTRY_SIZE (12) 519 520static const bfd_byte sparc_plt_first_entry[SPARC_PLT_ENTRY_SIZE] = 521{ 522 /* sethi %hi(0),%g1; address filled in by runtime linker. */ 523 0x3, 0, 0, 0, 524 /* jmp %g1; offset filled in by runtime linker. */ 525 0x81, 0xc0, 0x60, 0, 526 /* nop */ 527 0x1, 0, 0, 0 528}; 529 530/* save %sp, -96, %sp */ 531#define SPARC_PLT_ENTRY_WORD0 ((bfd_vma) 0x9de3bfa0) 532/* call; address filled in later. */ 533#define SPARC_PLT_ENTRY_WORD1 ((bfd_vma) 0x40000000) 534/* sethi; reloc index filled in later. */ 535#define SPARC_PLT_ENTRY_WORD2 ((bfd_vma) 0x01000000) 536 537/* This sequence is used when for the jump table entry to a defined 538 symbol in a complete executable. It is used when linking PIC 539 compiled code which is not being put into a shared library. */ 540/* sethi <address to be filled in later>, %g1 */ 541#define SPARC_PLT_PIC_WORD0 ((bfd_vma) 0x03000000) 542/* jmp %g1 + <address to be filled in later> */ 543#define SPARC_PLT_PIC_WORD1 ((bfd_vma) 0x81c06000) 544/* nop */ 545#define SPARC_PLT_PIC_WORD2 ((bfd_vma) 0x01000000) 546 547/* An m68k procedure linkage table entry is 8 bytes. The first entry 548 in the table is a jump which is filled in the by the runtime 549 linker. The remaining entries are branches back to the first 550 entry, followed by a two byte index into the relocation table. */ 551 552#define M68K_PLT_ENTRY_SIZE (8) 553 554static const bfd_byte m68k_plt_first_entry[M68K_PLT_ENTRY_SIZE] = 555{ 556 /* jmps @# */ 557 0x4e, 0xf9, 558 /* Filled in by runtime linker with a magic address. */ 559 0, 0, 0, 0, 560 /* Not used? */ 561 0, 0 562}; 563 564/* bsrl */ 565#define M68K_PLT_ENTRY_WORD0 ((bfd_vma) 0x61ff) 566/* Remaining words filled in later. */ 567 568/* An entry in the SunOS linker hash table. */ 569 570struct sunos_link_hash_entry 571{ 572 struct aout_link_hash_entry root; 573 574 /* If this is a dynamic symbol, this is its index into the dynamic 575 symbol table. This is initialized to -1. As the linker looks at 576 the input files, it changes this to -2 if it will be added to the 577 dynamic symbol table. After all the input files have been seen, 578 the linker will know whether to build a dynamic symbol table; if 579 it does build one, this becomes the index into the table. */ 580 long dynindx; 581 582 /* If this is a dynamic symbol, this is the index of the name in the 583 dynamic symbol string table. */ 584 long dynstr_index; 585 586 /* The offset into the global offset table used for this symbol. If 587 the symbol does not require a GOT entry, this is 0. */ 588 bfd_vma got_offset; 589 590 /* The offset into the procedure linkage table used for this symbol. 591 If the symbol does not require a PLT entry, this is 0. */ 592 bfd_vma plt_offset; 593 594 /* Some linker flags. */ 595 unsigned char flags; 596 /* Symbol is referenced by a regular object. */ 597#define SUNOS_REF_REGULAR 01 598 /* Symbol is defined by a regular object. */ 599#define SUNOS_DEF_REGULAR 02 600 /* Symbol is referenced by a dynamic object. */ 601#define SUNOS_REF_DYNAMIC 04 602 /* Symbol is defined by a dynamic object. */ 603#define SUNOS_DEF_DYNAMIC 010 604 /* Symbol is a constructor symbol in a regular object. */ 605#define SUNOS_CONSTRUCTOR 020 606}; 607 608/* The SunOS linker hash table. */ 609 610struct sunos_link_hash_table 611{ 612 struct aout_link_hash_table root; 613 614 /* The object which holds the dynamic sections. */ 615 bfd *dynobj; 616 617 /* Whether we have created the dynamic sections. */ 618 bfd_boolean dynamic_sections_created; 619 620 /* Whether we need the dynamic sections. */ 621 bfd_boolean dynamic_sections_needed; 622 623 /* Whether we need the .got table. */ 624 bfd_boolean got_needed; 625 626 /* The number of dynamic symbols. */ 627 size_t dynsymcount; 628 629 /* The number of buckets in the hash table. */ 630 size_t bucketcount; 631 632 /* The list of dynamic objects needed by dynamic objects included in 633 the link. */ 634 struct bfd_link_needed_list *needed; 635 636 /* The offset of __GLOBAL_OFFSET_TABLE_ into the .got section. */ 637 bfd_vma got_base; 638}; 639 640/* Routine to create an entry in an SunOS link hash table. */ 641 642static struct bfd_hash_entry * 643sunos_link_hash_newfunc (struct bfd_hash_entry *entry, 644 struct bfd_hash_table *table, 645 const char *string) 646{ 647 struct sunos_link_hash_entry *ret = (struct sunos_link_hash_entry *) entry; 648 649 /* Allocate the structure if it has not already been allocated by a 650 subclass. */ 651 if (ret == NULL) 652 ret = bfd_hash_allocate (table, sizeof (* ret)); 653 if (ret == NULL) 654 return NULL; 655 656 /* Call the allocation method of the superclass. */ 657 ret = ((struct sunos_link_hash_entry *) 658 NAME (aout, link_hash_newfunc) ((struct bfd_hash_entry *) ret, 659 table, string)); 660 if (ret != NULL) 661 { 662 /* Set local fields. */ 663 ret->dynindx = -1; 664 ret->dynstr_index = -1; 665 ret->got_offset = 0; 666 ret->plt_offset = 0; 667 ret->flags = 0; 668 } 669 670 return (struct bfd_hash_entry *) ret; 671} 672 673/* Create a SunOS link hash table. */ 674 675static struct bfd_link_hash_table * 676sunos_link_hash_table_create (bfd *abfd) 677{ 678 struct sunos_link_hash_table *ret; 679 bfd_size_type amt = sizeof (struct sunos_link_hash_table); 680 681 ret = bfd_malloc (amt); 682 if (ret == NULL) 683 return NULL; 684 if (!NAME (aout, link_hash_table_init) (&ret->root, abfd, 685 sunos_link_hash_newfunc, 686 sizeof (struct sunos_link_hash_entry))) 687 { 688 free (ret); 689 return NULL; 690 } 691 692 ret->dynobj = NULL; 693 ret->dynamic_sections_created = FALSE; 694 ret->dynamic_sections_needed = FALSE; 695 ret->got_needed = FALSE; 696 ret->dynsymcount = 0; 697 ret->bucketcount = 0; 698 ret->needed = NULL; 699 ret->got_base = 0; 700 701 return &ret->root.root; 702} 703 704/* Look up an entry in an SunOS link hash table. */ 705 706#define sunos_link_hash_lookup(table, string, create, copy, follow) \ 707 ((struct sunos_link_hash_entry *) \ 708 aout_link_hash_lookup (&(table)->root, (string), (create), (copy),\ 709 (follow))) 710 711/* Traverse a SunOS link hash table. */ 712 713#define sunos_link_hash_traverse(table, func, info) \ 714 (aout_link_hash_traverse \ 715 (&(table)->root, \ 716 (bfd_boolean (*) (struct aout_link_hash_entry *, void *)) (func), \ 717 (info))) 718 719/* Get the SunOS link hash table from the info structure. This is 720 just a cast. */ 721 722#define sunos_hash_table(p) ((struct sunos_link_hash_table *) ((p)->hash)) 723 724/* Create the dynamic sections needed if we are linking against a 725 dynamic object, or if we are linking PIC compiled code. ABFD is a 726 bfd we can attach the dynamic sections to. The linker script will 727 look for these special sections names and put them in the right 728 place in the output file. See include/aout/sun4.h for more details 729 of the dynamic linking information. */ 730 731static bfd_boolean 732sunos_create_dynamic_sections (bfd *abfd, 733 struct bfd_link_info *info, 734 bfd_boolean needed) 735{ 736 asection *s; 737 738 if (! sunos_hash_table (info)->dynamic_sections_created) 739 { 740 flagword flags; 741 742 sunos_hash_table (info)->dynobj = abfd; 743 744 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY 745 | SEC_LINKER_CREATED); 746 747 /* The .dynamic section holds the basic dynamic information: the 748 sun4_dynamic structure, the dynamic debugger information, and 749 the sun4_dynamic_link structure. */ 750 s = bfd_make_section_with_flags (abfd, ".dynamic", flags); 751 if (s == NULL 752 || ! bfd_set_section_alignment (abfd, s, 2)) 753 return FALSE; 754 755 /* The .got section holds the global offset table. The address 756 is put in the ld_got field. */ 757 s = bfd_make_section_with_flags (abfd, ".got", flags); 758 if (s == NULL 759 || ! bfd_set_section_alignment (abfd, s, 2)) 760 return FALSE; 761 762 /* The .plt section holds the procedure linkage table. The 763 address is put in the ld_plt field. */ 764 s = bfd_make_section_with_flags (abfd, ".plt", flags | SEC_CODE); 765 if (s == NULL 766 || ! bfd_set_section_alignment (abfd, s, 2)) 767 return FALSE; 768 769 /* The .dynrel section holds the dynamic relocs. The address is 770 put in the ld_rel field. */ 771 s = bfd_make_section_with_flags (abfd, ".dynrel", flags | SEC_READONLY); 772 if (s == NULL 773 || ! bfd_set_section_alignment (abfd, s, 2)) 774 return FALSE; 775 776 /* The .hash section holds the dynamic hash table. The address 777 is put in the ld_hash field. */ 778 s = bfd_make_section_with_flags (abfd, ".hash", flags | SEC_READONLY); 779 if (s == NULL 780 || ! bfd_set_section_alignment (abfd, s, 2)) 781 return FALSE; 782 783 /* The .dynsym section holds the dynamic symbols. The address 784 is put in the ld_stab field. */ 785 s = bfd_make_section_with_flags (abfd, ".dynsym", flags | SEC_READONLY); 786 if (s == NULL 787 || ! bfd_set_section_alignment (abfd, s, 2)) 788 return FALSE; 789 790 /* The .dynstr section holds the dynamic symbol string table. 791 The address is put in the ld_symbols field. */ 792 s = bfd_make_section_with_flags (abfd, ".dynstr", flags | SEC_READONLY); 793 if (s == NULL 794 || ! bfd_set_section_alignment (abfd, s, 2)) 795 return FALSE; 796 797 sunos_hash_table (info)->dynamic_sections_created = TRUE; 798 } 799 800 if ((needed && ! sunos_hash_table (info)->dynamic_sections_needed) 801 || info->shared) 802 { 803 bfd *dynobj; 804 805 dynobj = sunos_hash_table (info)->dynobj; 806 807 s = bfd_get_section_by_name (dynobj, ".got"); 808 if (s->size == 0) 809 s->size = BYTES_IN_WORD; 810 811 sunos_hash_table (info)->dynamic_sections_needed = TRUE; 812 sunos_hash_table (info)->got_needed = TRUE; 813 } 814 815 return TRUE; 816} 817 818/* Add dynamic symbols during a link. This is called by the a.out 819 backend linker for each object it encounters. */ 820 821static bfd_boolean 822sunos_add_dynamic_symbols (bfd *abfd, 823 struct bfd_link_info *info, 824 struct external_nlist **symsp, 825 bfd_size_type *sym_countp, 826 char **stringsp) 827{ 828 bfd *dynobj; 829 struct sunos_dynamic_info *dinfo; 830 unsigned long need; 831 832 /* Make sure we have all the required sections. */ 833 if (info->output_bfd->xvec == abfd->xvec) 834 { 835 if (! sunos_create_dynamic_sections (abfd, info, 836 ((abfd->flags & DYNAMIC) != 0 837 && !info->relocatable))) 838 return FALSE; 839 } 840 841 /* There is nothing else to do for a normal object. */ 842 if ((abfd->flags & DYNAMIC) == 0) 843 return TRUE; 844 845 dynobj = sunos_hash_table (info)->dynobj; 846 847 /* We do not want to include the sections in a dynamic object in the 848 output file. We hack by simply clobbering the list of sections 849 in the BFD. This could be handled more cleanly by, say, a new 850 section flag; the existing SEC_NEVER_LOAD flag is not the one we 851 want, because that one still implies that the section takes up 852 space in the output file. If this is the first object we have 853 seen, we must preserve the dynamic sections we just created. */ 854 if (abfd != dynobj) 855 abfd->sections = NULL; 856 else 857 { 858 asection *s; 859 860 for (s = abfd->sections; s != NULL; s = s->next) 861 { 862 if ((s->flags & SEC_LINKER_CREATED) == 0) 863 bfd_section_list_remove (abfd, s); 864 } 865 } 866 867 /* The native linker seems to just ignore dynamic objects when -r is 868 used. */ 869 if (info->relocatable) 870 return TRUE; 871 872 /* There's no hope of using a dynamic object which does not exactly 873 match the format of the output file. */ 874 if (info->output_bfd->xvec != abfd->xvec) 875 { 876 bfd_set_error (bfd_error_invalid_operation); 877 return FALSE; 878 } 879 880 /* Make sure we have a .need and a .rules sections. These are only 881 needed if there really is a dynamic object in the link, so they 882 are not added by sunos_create_dynamic_sections. */ 883 if (bfd_get_section_by_name (dynobj, ".need") == NULL) 884 { 885 /* The .need section holds the list of names of shared objets 886 which must be included at runtime. The address of this 887 section is put in the ld_need field. */ 888 flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS 889 | SEC_IN_MEMORY | SEC_READONLY); 890 asection *s = bfd_make_section_with_flags (dynobj, ".need", flags); 891 if (s == NULL 892 || ! bfd_set_section_alignment (dynobj, s, 2)) 893 return FALSE; 894 } 895 896 if (bfd_get_section_by_name (dynobj, ".rules") == NULL) 897 { 898 /* The .rules section holds the path to search for shared 899 objects. The address of this section is put in the ld_rules 900 field. */ 901 flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS 902 | SEC_IN_MEMORY | SEC_READONLY); 903 asection *s = bfd_make_section_with_flags (dynobj, ".rules", flags); 904 if (s == NULL 905 || ! bfd_set_section_alignment (dynobj, s, 2)) 906 return FALSE; 907 } 908 909 /* Pick up the dynamic symbols and return them to the caller. */ 910 if (! sunos_slurp_dynamic_symtab (abfd)) 911 return FALSE; 912 913 dinfo = (struct sunos_dynamic_info *) obj_aout_dynamic_info (abfd); 914 *symsp = dinfo->dynsym; 915 *sym_countp = dinfo->dynsym_count; 916 *stringsp = dinfo->dynstr; 917 918 /* Record information about any other objects needed by this one. */ 919 need = dinfo->dyninfo.ld_need; 920 while (need != 0) 921 { 922 bfd_byte buf[16]; 923 unsigned long name, flags; 924 unsigned short major_vno, minor_vno; 925 struct bfd_link_needed_list *needed, **pp; 926 char *namebuf, *p; 927 bfd_size_type alc; 928 bfd_byte b; 929 char *namecopy; 930 931 if (bfd_seek (abfd, (file_ptr) need, SEEK_SET) != 0 932 || bfd_bread (buf, (bfd_size_type) 16, abfd) != 16) 933 return FALSE; 934 935 /* For the format of an ld_need entry, see aout/sun4.h. We 936 should probably define structs for this manipulation. */ 937 name = bfd_get_32 (abfd, buf); 938 flags = bfd_get_32 (abfd, buf + 4); 939 major_vno = (unsigned short) bfd_get_16 (abfd, buf + 8); 940 minor_vno = (unsigned short) bfd_get_16 (abfd, buf + 10); 941 need = bfd_get_32 (abfd, buf + 12); 942 943 alc = sizeof (struct bfd_link_needed_list); 944 needed = bfd_alloc (abfd, alc); 945 if (needed == NULL) 946 return FALSE; 947 needed->by = abfd; 948 949 /* We return the name as [-l]name[.maj][.min]. */ 950 alc = 30; 951 namebuf = bfd_malloc (alc + 1); 952 if (namebuf == NULL) 953 return FALSE; 954 p = namebuf; 955 956 if ((flags & 0x80000000) != 0) 957 { 958 *p++ = '-'; 959 *p++ = 'l'; 960 } 961 if (bfd_seek (abfd, (file_ptr) name, SEEK_SET) != 0) 962 { 963 free (namebuf); 964 return FALSE; 965 } 966 967 do 968 { 969 if (bfd_bread (&b, (bfd_size_type) 1, abfd) != 1) 970 { 971 free (namebuf); 972 return FALSE; 973 } 974 975 if ((bfd_size_type) (p - namebuf) >= alc) 976 { 977 char *n; 978 979 alc *= 2; 980 n = bfd_realloc (namebuf, alc + 1); 981 if (n == NULL) 982 { 983 free (namebuf); 984 return FALSE; 985 } 986 p = n + (p - namebuf); 987 namebuf = n; 988 } 989 990 *p++ = b; 991 } 992 while (b != '\0'); 993 994 if (major_vno == 0) 995 *p = '\0'; 996 else 997 { 998 char majbuf[30]; 999 char minbuf[30]; 1000 1001 sprintf (majbuf, ".%d", major_vno); 1002 if (minor_vno == 0) 1003 minbuf[0] = '\0'; 1004 else 1005 sprintf (minbuf, ".%d", minor_vno); 1006 1007 if ((p - namebuf) + strlen (majbuf) + strlen (minbuf) >= alc) 1008 { 1009 char *n; 1010 1011 alc = (p - namebuf) + strlen (majbuf) + strlen (minbuf); 1012 n = bfd_realloc (namebuf, alc + 1); 1013 if (n == NULL) 1014 { 1015 free (namebuf); 1016 return FALSE; 1017 } 1018 p = n + (p - namebuf); 1019 namebuf = n; 1020 } 1021 1022 strcpy (p, majbuf); 1023 strcat (p, minbuf); 1024 } 1025 1026 namecopy = bfd_alloc (abfd, (bfd_size_type) strlen (namebuf) + 1); 1027 if (namecopy == NULL) 1028 { 1029 free (namebuf); 1030 return FALSE; 1031 } 1032 strcpy (namecopy, namebuf); 1033 free (namebuf); 1034 needed->name = namecopy; 1035 1036 needed->next = NULL; 1037 1038 for (pp = &sunos_hash_table (info)->needed; 1039 *pp != NULL; 1040 pp = &(*pp)->next) 1041 ; 1042 *pp = needed; 1043 } 1044 1045 return TRUE; 1046} 1047 1048/* Function to add a single symbol to the linker hash table. This is 1049 a wrapper around _bfd_generic_link_add_one_symbol which handles the 1050 tweaking needed for dynamic linking support. */ 1051 1052static bfd_boolean 1053sunos_add_one_symbol (struct bfd_link_info *info, 1054 bfd *abfd, 1055 const char *name, 1056 flagword flags, 1057 asection *section, 1058 bfd_vma value, 1059 const char *string, 1060 bfd_boolean copy, 1061 bfd_boolean collect, 1062 struct bfd_link_hash_entry **hashp) 1063{ 1064 struct sunos_link_hash_entry *h; 1065 int new_flag; 1066 1067 if ((flags & (BSF_INDIRECT | BSF_WARNING | BSF_CONSTRUCTOR)) != 0 1068 || ! bfd_is_und_section (section)) 1069 h = sunos_link_hash_lookup (sunos_hash_table (info), name, TRUE, copy, 1070 FALSE); 1071 else 1072 h = ((struct sunos_link_hash_entry *) 1073 bfd_wrapped_link_hash_lookup (abfd, info, name, TRUE, copy, FALSE)); 1074 if (h == NULL) 1075 return FALSE; 1076 1077 if (hashp != NULL) 1078 *hashp = (struct bfd_link_hash_entry *) h; 1079 1080 /* Treat a common symbol in a dynamic object as defined in the .bss 1081 section of the dynamic object. We don't want to allocate space 1082 for it in our process image. */ 1083 if ((abfd->flags & DYNAMIC) != 0 1084 && bfd_is_com_section (section)) 1085 section = obj_bsssec (abfd); 1086 1087 if (! bfd_is_und_section (section) 1088 && h->root.root.type != bfd_link_hash_new 1089 && h->root.root.type != bfd_link_hash_undefined 1090 && h->root.root.type != bfd_link_hash_defweak) 1091 { 1092 /* We are defining the symbol, and it is already defined. This 1093 is a potential multiple definition error. */ 1094 if ((abfd->flags & DYNAMIC) != 0) 1095 { 1096 /* The definition we are adding is from a dynamic object. 1097 We do not want this new definition to override the 1098 existing definition, so we pretend it is just a 1099 reference. */ 1100 section = bfd_und_section_ptr; 1101 } 1102 else if (h->root.root.type == bfd_link_hash_defined 1103 && h->root.root.u.def.section->owner != NULL 1104 && (h->root.root.u.def.section->owner->flags & DYNAMIC) != 0) 1105 { 1106 /* The existing definition is from a dynamic object. We 1107 want to override it with the definition we just found. 1108 Clobber the existing definition. */ 1109 h->root.root.type = bfd_link_hash_undefined; 1110 h->root.root.u.undef.abfd = h->root.root.u.def.section->owner; 1111 } 1112 else if (h->root.root.type == bfd_link_hash_common 1113 && (h->root.root.u.c.p->section->owner->flags & DYNAMIC) != 0) 1114 { 1115 /* The existing definition is from a dynamic object. We 1116 want to override it with the definition we just found. 1117 Clobber the existing definition. We can't set it to new, 1118 because it is on the undefined list. */ 1119 h->root.root.type = bfd_link_hash_undefined; 1120 h->root.root.u.undef.abfd = h->root.root.u.c.p->section->owner; 1121 } 1122 } 1123 1124 if ((abfd->flags & DYNAMIC) != 0 1125 && abfd->xvec == info->output_bfd->xvec 1126 && (h->flags & SUNOS_CONSTRUCTOR) != 0) 1127 /* The existing symbol is a constructor symbol, and this symbol 1128 is from a dynamic object. A constructor symbol is actually a 1129 definition, although the type will be bfd_link_hash_undefined 1130 at this point. We want to ignore the definition from the 1131 dynamic object. */ 1132 section = bfd_und_section_ptr; 1133 else if ((flags & BSF_CONSTRUCTOR) != 0 1134 && (abfd->flags & DYNAMIC) == 0 1135 && h->root.root.type == bfd_link_hash_defined 1136 && h->root.root.u.def.section->owner != NULL 1137 && (h->root.root.u.def.section->owner->flags & DYNAMIC) != 0) 1138 /* The existing symbol is defined by a dynamic object, and this 1139 is a constructor symbol. As above, we want to force the use 1140 of the constructor symbol from the regular object. */ 1141 h->root.root.type = bfd_link_hash_new; 1142 1143 /* Do the usual procedure for adding a symbol. */ 1144 if (! _bfd_generic_link_add_one_symbol (info, abfd, name, flags, section, 1145 value, string, copy, collect, 1146 hashp)) 1147 return FALSE; 1148 1149 if (abfd->xvec == info->output_bfd->xvec) 1150 { 1151 /* Set a flag in the hash table entry indicating the type of 1152 reference or definition we just found. Keep a count of the 1153 number of dynamic symbols we find. A dynamic symbol is one 1154 which is referenced or defined by both a regular object and a 1155 shared object. */ 1156 if ((abfd->flags & DYNAMIC) == 0) 1157 { 1158 if (bfd_is_und_section (section)) 1159 new_flag = SUNOS_REF_REGULAR; 1160 else 1161 new_flag = SUNOS_DEF_REGULAR; 1162 } 1163 else 1164 { 1165 if (bfd_is_und_section (section)) 1166 new_flag = SUNOS_REF_DYNAMIC; 1167 else 1168 new_flag = SUNOS_DEF_DYNAMIC; 1169 } 1170 h->flags |= new_flag; 1171 1172 if (h->dynindx == -1 1173 && (h->flags & (SUNOS_DEF_REGULAR | SUNOS_REF_REGULAR)) != 0) 1174 { 1175 ++sunos_hash_table (info)->dynsymcount; 1176 h->dynindx = -2; 1177 } 1178 1179 if ((flags & BSF_CONSTRUCTOR) != 0 1180 && (abfd->flags & DYNAMIC) == 0) 1181 h->flags |= SUNOS_CONSTRUCTOR; 1182 } 1183 1184 return TRUE; 1185} 1186 1187extern const bfd_target MY (vec); 1188 1189/* Return the list of objects needed by BFD. */ 1190 1191struct bfd_link_needed_list * 1192bfd_sunos_get_needed_list (bfd *abfd ATTRIBUTE_UNUSED, 1193 struct bfd_link_info *info) 1194{ 1195 if (info->output_bfd->xvec != &MY (vec)) 1196 return NULL; 1197 return sunos_hash_table (info)->needed; 1198} 1199 1200/* Record an assignment made to a symbol by a linker script. We need 1201 this in case some dynamic object refers to this symbol. */ 1202 1203bfd_boolean 1204bfd_sunos_record_link_assignment (bfd *output_bfd, 1205 struct bfd_link_info *info, 1206 const char *name) 1207{ 1208 struct sunos_link_hash_entry *h; 1209 1210 if (output_bfd->xvec != &MY(vec)) 1211 return TRUE; 1212 1213 /* This is called after we have examined all the input objects. If 1214 the symbol does not exist, it merely means that no object refers 1215 to it, and we can just ignore it at this point. */ 1216 h = sunos_link_hash_lookup (sunos_hash_table (info), name, 1217 FALSE, FALSE, FALSE); 1218 if (h == NULL) 1219 return TRUE; 1220 1221 /* In a shared library, the __DYNAMIC symbol does not appear in the 1222 dynamic symbol table. */ 1223 if (! info->shared || strcmp (name, "__DYNAMIC") != 0) 1224 { 1225 h->flags |= SUNOS_DEF_REGULAR; 1226 1227 if (h->dynindx == -1) 1228 { 1229 ++sunos_hash_table (info)->dynsymcount; 1230 h->dynindx = -2; 1231 } 1232 } 1233 1234 return TRUE; 1235} 1236 1237/* Scan the relocs for an input section using standard relocs. We 1238 need to figure out what to do for each reloc against a dynamic 1239 symbol. If the symbol is in the .text section, an entry is made in 1240 the procedure linkage table. Note that this will do the wrong 1241 thing if the symbol is actually data; I don't think the Sun 3 1242 native linker handles this case correctly either. If the symbol is 1243 not in the .text section, we must preserve the reloc as a dynamic 1244 reloc. FIXME: We should also handle the PIC relocs here by 1245 building global offset table entries. */ 1246 1247static bfd_boolean 1248sunos_scan_std_relocs (struct bfd_link_info *info, 1249 bfd *abfd, 1250 asection *sec ATTRIBUTE_UNUSED, 1251 const struct reloc_std_external *relocs, 1252 bfd_size_type rel_size) 1253{ 1254 bfd *dynobj; 1255 asection *splt = NULL; 1256 asection *srel = NULL; 1257 struct sunos_link_hash_entry **sym_hashes; 1258 const struct reloc_std_external *rel, *relend; 1259 1260 /* We only know how to handle m68k plt entries. */ 1261 if (bfd_get_arch (abfd) != bfd_arch_m68k) 1262 { 1263 bfd_set_error (bfd_error_invalid_target); 1264 return FALSE; 1265 } 1266 1267 dynobj = NULL; 1268 1269 sym_hashes = (struct sunos_link_hash_entry **) obj_aout_sym_hashes (abfd); 1270 1271 relend = relocs + rel_size / RELOC_STD_SIZE; 1272 for (rel = relocs; rel < relend; rel++) 1273 { 1274 int r_index; 1275 struct sunos_link_hash_entry *h; 1276 1277 /* We only want relocs against external symbols. */ 1278 if (bfd_header_big_endian (abfd)) 1279 { 1280 if ((rel->r_type[0] & RELOC_STD_BITS_EXTERN_BIG) == 0) 1281 continue; 1282 } 1283 else 1284 { 1285 if ((rel->r_type[0] & RELOC_STD_BITS_EXTERN_LITTLE) == 0) 1286 continue; 1287 } 1288 1289 /* Get the symbol index. */ 1290 if (bfd_header_big_endian (abfd)) 1291 r_index = ((rel->r_index[0] << 16) 1292 | (rel->r_index[1] << 8) 1293 | rel->r_index[2]); 1294 else 1295 r_index = ((rel->r_index[2] << 16) 1296 | (rel->r_index[1] << 8) 1297 | rel->r_index[0]); 1298 1299 /* Get the hash table entry. */ 1300 h = sym_hashes[r_index]; 1301 if (h == NULL) 1302 /* This should not normally happen, but it will in any case 1303 be caught in the relocation phase. */ 1304 continue; 1305 1306 /* At this point common symbols have already been allocated, so 1307 we don't have to worry about them. We need to consider that 1308 we may have already seen this symbol and marked it undefined; 1309 if the symbol is really undefined, then SUNOS_DEF_DYNAMIC 1310 will be zero. */ 1311 if (h->root.root.type != bfd_link_hash_defined 1312 && h->root.root.type != bfd_link_hash_defweak 1313 && h->root.root.type != bfd_link_hash_undefined) 1314 continue; 1315 1316 if ((h->flags & SUNOS_DEF_DYNAMIC) == 0 1317 || (h->flags & SUNOS_DEF_REGULAR) != 0) 1318 continue; 1319 1320 if (dynobj == NULL) 1321 { 1322 asection *sgot; 1323 1324 if (! sunos_create_dynamic_sections (abfd, info, FALSE)) 1325 return FALSE; 1326 dynobj = sunos_hash_table (info)->dynobj; 1327 splt = bfd_get_section_by_name (dynobj, ".plt"); 1328 srel = bfd_get_section_by_name (dynobj, ".dynrel"); 1329 BFD_ASSERT (splt != NULL && srel != NULL); 1330 1331 sgot = bfd_get_section_by_name (dynobj, ".got"); 1332 BFD_ASSERT (sgot != NULL); 1333 if (sgot->size == 0) 1334 sgot->size = BYTES_IN_WORD; 1335 sunos_hash_table (info)->got_needed = TRUE; 1336 } 1337 1338 BFD_ASSERT ((h->flags & SUNOS_REF_REGULAR) != 0); 1339 BFD_ASSERT (h->plt_offset != 0 1340 || ((h->root.root.type == bfd_link_hash_defined 1341 || h->root.root.type == bfd_link_hash_defweak) 1342 ? (h->root.root.u.def.section->owner->flags 1343 & DYNAMIC) != 0 1344 : (h->root.root.u.undef.abfd->flags & DYNAMIC) != 0)); 1345 1346 /* This reloc is against a symbol defined only by a dynamic 1347 object. */ 1348 if (h->root.root.type == bfd_link_hash_undefined) 1349 /* Presumably this symbol was marked as being undefined by 1350 an earlier reloc. */ 1351 srel->size += RELOC_STD_SIZE; 1352 else if ((h->root.root.u.def.section->flags & SEC_CODE) == 0) 1353 { 1354 bfd *sub; 1355 1356 /* This reloc is not in the .text section. It must be 1357 copied into the dynamic relocs. We mark the symbol as 1358 being undefined. */ 1359 srel->size += RELOC_STD_SIZE; 1360 sub = h->root.root.u.def.section->owner; 1361 h->root.root.type = bfd_link_hash_undefined; 1362 h->root.root.u.undef.abfd = sub; 1363 } 1364 else 1365 { 1366 /* This symbol is in the .text section. We must give it an 1367 entry in the procedure linkage table, if we have not 1368 already done so. We change the definition of the symbol 1369 to the .plt section; this will cause relocs against it to 1370 be handled correctly. */ 1371 if (h->plt_offset == 0) 1372 { 1373 if (splt->size == 0) 1374 splt->size = M68K_PLT_ENTRY_SIZE; 1375 h->plt_offset = splt->size; 1376 1377 if ((h->flags & SUNOS_DEF_REGULAR) == 0) 1378 { 1379 h->root.root.u.def.section = splt; 1380 h->root.root.u.def.value = splt->size; 1381 } 1382 1383 splt->size += M68K_PLT_ENTRY_SIZE; 1384 1385 /* We may also need a dynamic reloc entry. */ 1386 if ((h->flags & SUNOS_DEF_REGULAR) == 0) 1387 srel->size += RELOC_STD_SIZE; 1388 } 1389 } 1390 } 1391 1392 return TRUE; 1393} 1394 1395/* Scan the relocs for an input section using extended relocs. We 1396 need to figure out what to do for each reloc against a dynamic 1397 symbol. If the reloc is a WDISP30, and the symbol is in the .text 1398 section, an entry is made in the procedure linkage table. 1399 Otherwise, we must preserve the reloc as a dynamic reloc. */ 1400 1401static bfd_boolean 1402sunos_scan_ext_relocs (struct bfd_link_info *info, 1403 bfd *abfd, 1404 asection *sec ATTRIBUTE_UNUSED, 1405 const struct reloc_ext_external *relocs, 1406 bfd_size_type rel_size) 1407{ 1408 bfd *dynobj; 1409 struct sunos_link_hash_entry **sym_hashes; 1410 const struct reloc_ext_external *rel, *relend; 1411 asection *splt = NULL; 1412 asection *sgot = NULL; 1413 asection *srel = NULL; 1414 bfd_size_type amt; 1415 1416 /* We only know how to handle SPARC plt entries. */ 1417 if (bfd_get_arch (abfd) != bfd_arch_sparc) 1418 { 1419 bfd_set_error (bfd_error_invalid_target); 1420 return FALSE; 1421 } 1422 1423 dynobj = NULL; 1424 1425 sym_hashes = (struct sunos_link_hash_entry **) obj_aout_sym_hashes (abfd); 1426 1427 relend = relocs + rel_size / RELOC_EXT_SIZE; 1428 for (rel = relocs; rel < relend; rel++) 1429 { 1430 unsigned int r_index; 1431 int r_extern; 1432 int r_type; 1433 struct sunos_link_hash_entry *h = NULL; 1434 1435 /* Swap in the reloc information. */ 1436 if (bfd_header_big_endian (abfd)) 1437 { 1438 r_index = ((rel->r_index[0] << 16) 1439 | (rel->r_index[1] << 8) 1440 | rel->r_index[2]); 1441 r_extern = (0 != (rel->r_type[0] & RELOC_EXT_BITS_EXTERN_BIG)); 1442 r_type = ((rel->r_type[0] & RELOC_EXT_BITS_TYPE_BIG) 1443 >> RELOC_EXT_BITS_TYPE_SH_BIG); 1444 } 1445 else 1446 { 1447 r_index = ((rel->r_index[2] << 16) 1448 | (rel->r_index[1] << 8) 1449 | rel->r_index[0]); 1450 r_extern = (0 != (rel->r_type[0] & RELOC_EXT_BITS_EXTERN_LITTLE)); 1451 r_type = ((rel->r_type[0] & RELOC_EXT_BITS_TYPE_LITTLE) 1452 >> RELOC_EXT_BITS_TYPE_SH_LITTLE); 1453 } 1454 1455 if (r_extern) 1456 { 1457 h = sym_hashes[r_index]; 1458 if (h == NULL) 1459 { 1460 /* This should not normally happen, but it will in any 1461 case be caught in the relocation phase. */ 1462 continue; 1463 } 1464 } 1465 1466 /* If this is a base relative reloc, we need to make an entry in 1467 the .got section. */ 1468 if (r_type == RELOC_BASE10 1469 || r_type == RELOC_BASE13 1470 || r_type == RELOC_BASE22) 1471 { 1472 if (dynobj == NULL) 1473 { 1474 if (! sunos_create_dynamic_sections (abfd, info, FALSE)) 1475 return FALSE; 1476 dynobj = sunos_hash_table (info)->dynobj; 1477 splt = bfd_get_section_by_name (dynobj, ".plt"); 1478 sgot = bfd_get_section_by_name (dynobj, ".got"); 1479 srel = bfd_get_section_by_name (dynobj, ".dynrel"); 1480 BFD_ASSERT (splt != NULL && sgot != NULL && srel != NULL); 1481 1482 /* Make sure we have an initial entry in the .got table. */ 1483 if (sgot->size == 0) 1484 sgot->size = BYTES_IN_WORD; 1485 sunos_hash_table (info)->got_needed = TRUE; 1486 } 1487 1488 if (r_extern) 1489 { 1490 if (h->got_offset != 0) 1491 continue; 1492 1493 h->got_offset = sgot->size; 1494 } 1495 else 1496 { 1497 if (r_index >= bfd_get_symcount (abfd)) 1498 /* This is abnormal, but should be caught in the 1499 relocation phase. */ 1500 continue; 1501 1502 if (adata (abfd).local_got_offsets == NULL) 1503 { 1504 amt = bfd_get_symcount (abfd); 1505 amt *= sizeof (bfd_vma); 1506 adata (abfd).local_got_offsets = bfd_zalloc (abfd, amt); 1507 if (adata (abfd).local_got_offsets == NULL) 1508 return FALSE; 1509 } 1510 1511 if (adata (abfd).local_got_offsets[r_index] != 0) 1512 continue; 1513 1514 adata (abfd).local_got_offsets[r_index] = sgot->size; 1515 } 1516 1517 sgot->size += BYTES_IN_WORD; 1518 1519 /* If we are making a shared library, or if the symbol is 1520 defined by a dynamic object, we will need a dynamic reloc 1521 entry. */ 1522 if (info->shared 1523 || (h != NULL 1524 && (h->flags & SUNOS_DEF_DYNAMIC) != 0 1525 && (h->flags & SUNOS_DEF_REGULAR) == 0)) 1526 srel->size += RELOC_EXT_SIZE; 1527 1528 continue; 1529 } 1530 1531 /* Otherwise, we are only interested in relocs against symbols 1532 defined in dynamic objects but not in regular objects. We 1533 only need to consider relocs against external symbols. */ 1534 if (! r_extern) 1535 { 1536 /* But, if we are creating a shared library, we need to 1537 generate an absolute reloc. */ 1538 if (info->shared) 1539 { 1540 if (dynobj == NULL) 1541 { 1542 if (! sunos_create_dynamic_sections (abfd, info, TRUE)) 1543 return FALSE; 1544 dynobj = sunos_hash_table (info)->dynobj; 1545 splt = bfd_get_section_by_name (dynobj, ".plt"); 1546 sgot = bfd_get_section_by_name (dynobj, ".got"); 1547 srel = bfd_get_section_by_name (dynobj, ".dynrel"); 1548 BFD_ASSERT (splt != NULL && sgot != NULL && srel != NULL); 1549 } 1550 1551 srel->size += RELOC_EXT_SIZE; 1552 } 1553 1554 continue; 1555 } 1556 1557 /* At this point common symbols have already been allocated, so 1558 we don't have to worry about them. We need to consider that 1559 we may have already seen this symbol and marked it undefined; 1560 if the symbol is really undefined, then SUNOS_DEF_DYNAMIC 1561 will be zero. */ 1562 if (h->root.root.type != bfd_link_hash_defined 1563 && h->root.root.type != bfd_link_hash_defweak 1564 && h->root.root.type != bfd_link_hash_undefined) 1565 continue; 1566 1567 if (r_type != RELOC_JMP_TBL 1568 && ! info->shared 1569 && ((h->flags & SUNOS_DEF_DYNAMIC) == 0 1570 || (h->flags & SUNOS_DEF_REGULAR) != 0)) 1571 continue; 1572 1573 if (r_type == RELOC_JMP_TBL 1574 && ! info->shared 1575 && (h->flags & SUNOS_DEF_DYNAMIC) == 0 1576 && (h->flags & SUNOS_DEF_REGULAR) == 0) 1577 { 1578 /* This symbol is apparently undefined. Don't do anything 1579 here; just let the relocation routine report an undefined 1580 symbol. */ 1581 continue; 1582 } 1583 1584 if (strcmp (h->root.root.root.string, "__GLOBAL_OFFSET_TABLE_") == 0) 1585 continue; 1586 1587 if (dynobj == NULL) 1588 { 1589 if (! sunos_create_dynamic_sections (abfd, info, FALSE)) 1590 return FALSE; 1591 dynobj = sunos_hash_table (info)->dynobj; 1592 splt = bfd_get_section_by_name (dynobj, ".plt"); 1593 sgot = bfd_get_section_by_name (dynobj, ".got"); 1594 srel = bfd_get_section_by_name (dynobj, ".dynrel"); 1595 BFD_ASSERT (splt != NULL && sgot != NULL && srel != NULL); 1596 1597 /* Make sure we have an initial entry in the .got table. */ 1598 if (sgot->size == 0) 1599 sgot->size = BYTES_IN_WORD; 1600 sunos_hash_table (info)->got_needed = TRUE; 1601 } 1602 1603 BFD_ASSERT (r_type == RELOC_JMP_TBL 1604 || info->shared 1605 || (h->flags & SUNOS_REF_REGULAR) != 0); 1606 BFD_ASSERT (r_type == RELOC_JMP_TBL 1607 || info->shared 1608 || h->plt_offset != 0 1609 || ((h->root.root.type == bfd_link_hash_defined 1610 || h->root.root.type == bfd_link_hash_defweak) 1611 ? (h->root.root.u.def.section->owner->flags 1612 & DYNAMIC) != 0 1613 : (h->root.root.u.undef.abfd->flags & DYNAMIC) != 0)); 1614 1615 /* This reloc is against a symbol defined only by a dynamic 1616 object, or it is a jump table reloc from PIC compiled code. */ 1617 1618 if (r_type != RELOC_JMP_TBL 1619 && h->root.root.type == bfd_link_hash_undefined) 1620 /* Presumably this symbol was marked as being undefined by 1621 an earlier reloc. */ 1622 srel->size += RELOC_EXT_SIZE; 1623 1624 else if (r_type != RELOC_JMP_TBL 1625 && (h->root.root.u.def.section->flags & SEC_CODE) == 0) 1626 { 1627 bfd *sub; 1628 1629 /* This reloc is not in the .text section. It must be 1630 copied into the dynamic relocs. We mark the symbol as 1631 being undefined. */ 1632 srel->size += RELOC_EXT_SIZE; 1633 if ((h->flags & SUNOS_DEF_REGULAR) == 0) 1634 { 1635 sub = h->root.root.u.def.section->owner; 1636 h->root.root.type = bfd_link_hash_undefined; 1637 h->root.root.u.undef.abfd = sub; 1638 } 1639 } 1640 else 1641 { 1642 /* This symbol is in the .text section. We must give it an 1643 entry in the procedure linkage table, if we have not 1644 already done so. We change the definition of the symbol 1645 to the .plt section; this will cause relocs against it to 1646 be handled correctly. */ 1647 if (h->plt_offset == 0) 1648 { 1649 if (splt->size == 0) 1650 splt->size = SPARC_PLT_ENTRY_SIZE; 1651 h->plt_offset = splt->size; 1652 1653 if ((h->flags & SUNOS_DEF_REGULAR) == 0) 1654 { 1655 if (h->root.root.type == bfd_link_hash_undefined) 1656 h->root.root.type = bfd_link_hash_defined; 1657 h->root.root.u.def.section = splt; 1658 h->root.root.u.def.value = splt->size; 1659 } 1660 1661 splt->size += SPARC_PLT_ENTRY_SIZE; 1662 1663 /* We will also need a dynamic reloc entry, unless this 1664 is a JMP_TBL reloc produced by linking PIC compiled 1665 code, and we are not making a shared library. */ 1666 if (info->shared || (h->flags & SUNOS_DEF_REGULAR) == 0) 1667 srel->size += RELOC_EXT_SIZE; 1668 } 1669 1670 /* If we are creating a shared library, we need to copy over 1671 any reloc other than a jump table reloc. */ 1672 if (info->shared && r_type != RELOC_JMP_TBL) 1673 srel->size += RELOC_EXT_SIZE; 1674 } 1675 } 1676 1677 return TRUE; 1678} 1679 1680/* Scan the relocs for an input section. */ 1681 1682static bfd_boolean 1683sunos_scan_relocs (struct bfd_link_info *info, 1684 bfd *abfd, 1685 asection *sec, 1686 bfd_size_type rel_size) 1687{ 1688 void * relocs; 1689 void * free_relocs = NULL; 1690 1691 if (rel_size == 0) 1692 return TRUE; 1693 1694 if (! info->keep_memory) 1695 relocs = free_relocs = bfd_malloc (rel_size); 1696 else 1697 { 1698 struct aout_section_data_struct *n; 1699 bfd_size_type amt = sizeof (struct aout_section_data_struct); 1700 1701 n = bfd_alloc (abfd, amt); 1702 if (n == NULL) 1703 relocs = NULL; 1704 else 1705 { 1706 set_aout_section_data (sec, n); 1707 relocs = bfd_malloc (rel_size); 1708 aout_section_data (sec)->relocs = relocs; 1709 } 1710 } 1711 if (relocs == NULL) 1712 return FALSE; 1713 1714 if (bfd_seek (abfd, sec->rel_filepos, SEEK_SET) != 0 1715 || bfd_bread (relocs, rel_size, abfd) != rel_size) 1716 goto error_return; 1717 1718 if (obj_reloc_entry_size (abfd) == RELOC_STD_SIZE) 1719 { 1720 if (! sunos_scan_std_relocs (info, abfd, sec, 1721 (struct reloc_std_external *) relocs, 1722 rel_size)) 1723 goto error_return; 1724 } 1725 else 1726 { 1727 if (! sunos_scan_ext_relocs (info, abfd, sec, 1728 (struct reloc_ext_external *) relocs, 1729 rel_size)) 1730 goto error_return; 1731 } 1732 1733 if (free_relocs != NULL) 1734 free (free_relocs); 1735 1736 return TRUE; 1737 1738 error_return: 1739 if (free_relocs != NULL) 1740 free (free_relocs); 1741 return FALSE; 1742} 1743 1744/* Build the hash table of dynamic symbols, and to mark as written all 1745 symbols from dynamic objects which we do not plan to write out. */ 1746 1747static bfd_boolean 1748sunos_scan_dynamic_symbol (struct sunos_link_hash_entry *h, void * data) 1749{ 1750 struct bfd_link_info *info = (struct bfd_link_info *) data; 1751 1752 if (h->root.root.type == bfd_link_hash_warning) 1753 h = (struct sunos_link_hash_entry *) h->root.root.u.i.link; 1754 1755 /* Set the written flag for symbols we do not want to write out as 1756 part of the regular symbol table. This is all symbols which are 1757 not defined in a regular object file. For some reason symbols 1758 which are referenced by a regular object and defined by a dynamic 1759 object do not seem to show up in the regular symbol table. It is 1760 possible for a symbol to have only SUNOS_REF_REGULAR set here, it 1761 is an undefined symbol which was turned into a common symbol 1762 because it was found in an archive object which was not included 1763 in the link. */ 1764 if ((h->flags & SUNOS_DEF_REGULAR) == 0 1765 && (h->flags & SUNOS_DEF_DYNAMIC) != 0 1766 && strcmp (h->root.root.root.string, "__DYNAMIC") != 0) 1767 h->root.written = TRUE; 1768 1769 /* If this symbol is defined by a dynamic object and referenced by a 1770 regular object, see whether we gave it a reasonable value while 1771 scanning the relocs. */ 1772 if ((h->flags & SUNOS_DEF_REGULAR) == 0 1773 && (h->flags & SUNOS_DEF_DYNAMIC) != 0 1774 && (h->flags & SUNOS_REF_REGULAR) != 0) 1775 { 1776 if ((h->root.root.type == bfd_link_hash_defined 1777 || h->root.root.type == bfd_link_hash_defweak) 1778 && ((h->root.root.u.def.section->owner->flags & DYNAMIC) != 0) 1779 && h->root.root.u.def.section->output_section == NULL) 1780 { 1781 bfd *sub; 1782 1783 /* This symbol is currently defined in a dynamic section 1784 which is not being put into the output file. This 1785 implies that there is no reloc against the symbol. I'm 1786 not sure why this case would ever occur. In any case, we 1787 change the symbol to be undefined. */ 1788 sub = h->root.root.u.def.section->owner; 1789 h->root.root.type = bfd_link_hash_undefined; 1790 h->root.root.u.undef.abfd = sub; 1791 } 1792 } 1793 1794 /* If this symbol is defined or referenced by a regular file, add it 1795 to the dynamic symbols. */ 1796 if ((h->flags & (SUNOS_DEF_REGULAR | SUNOS_REF_REGULAR)) != 0) 1797 { 1798 asection *s; 1799 size_t len; 1800 bfd_byte *contents; 1801 unsigned char *name; 1802 unsigned long hash; 1803 bfd *dynobj; 1804 1805 BFD_ASSERT (h->dynindx == -2); 1806 1807 dynobj = sunos_hash_table (info)->dynobj; 1808 1809 h->dynindx = sunos_hash_table (info)->dynsymcount; 1810 ++sunos_hash_table (info)->dynsymcount; 1811 1812 len = strlen (h->root.root.root.string); 1813 1814 /* We don't bother to construct a BFD hash table for the strings 1815 which are the names of the dynamic symbols. Using a hash 1816 table for the regular symbols is beneficial, because the 1817 regular symbols includes the debugging symbols, which have 1818 long names and are often duplicated in several object files. 1819 There are no debugging symbols in the dynamic symbols. */ 1820 s = bfd_get_section_by_name (dynobj, ".dynstr"); 1821 BFD_ASSERT (s != NULL); 1822 contents = bfd_realloc (s->contents, s->size + len + 1); 1823 if (contents == NULL) 1824 return FALSE; 1825 s->contents = contents; 1826 1827 h->dynstr_index = s->size; 1828 strcpy ((char *) contents + s->size, h->root.root.root.string); 1829 s->size += len + 1; 1830 1831 /* Add it to the dynamic hash table. */ 1832 name = (unsigned char *) h->root.root.root.string; 1833 hash = 0; 1834 while (*name != '\0') 1835 hash = (hash << 1) + *name++; 1836 hash &= 0x7fffffff; 1837 hash %= sunos_hash_table (info)->bucketcount; 1838 1839 s = bfd_get_section_by_name (dynobj, ".hash"); 1840 BFD_ASSERT (s != NULL); 1841 1842 if (GET_SWORD (dynobj, s->contents + hash * HASH_ENTRY_SIZE) == -1) 1843 PUT_WORD (dynobj, h->dynindx, s->contents + hash * HASH_ENTRY_SIZE); 1844 else 1845 { 1846 bfd_vma next; 1847 1848 next = GET_WORD (dynobj, 1849 (s->contents 1850 + hash * HASH_ENTRY_SIZE 1851 + BYTES_IN_WORD)); 1852 PUT_WORD (dynobj, s->size / HASH_ENTRY_SIZE, 1853 s->contents + hash * HASH_ENTRY_SIZE + BYTES_IN_WORD); 1854 PUT_WORD (dynobj, h->dynindx, s->contents + s->size); 1855 PUT_WORD (dynobj, next, s->contents + s->size + BYTES_IN_WORD); 1856 s->size += HASH_ENTRY_SIZE; 1857 } 1858 } 1859 1860 return TRUE; 1861} 1862 1863/* Set up the sizes and contents of the dynamic sections created in 1864 sunos_add_dynamic_symbols. This is called by the SunOS linker 1865 emulation before_allocation routine. We must set the sizes of the 1866 sections before the linker sets the addresses of the various 1867 sections. This unfortunately requires reading all the relocs so 1868 that we can work out which ones need to become dynamic relocs. If 1869 info->keep_memory is TRUE, we keep the relocs in memory; otherwise, 1870 we discard them, and will read them again later. */ 1871 1872bfd_boolean 1873bfd_sunos_size_dynamic_sections (bfd *output_bfd, 1874 struct bfd_link_info *info, 1875 asection **sdynptr, 1876 asection **sneedptr, 1877 asection **srulesptr) 1878{ 1879 bfd *dynobj; 1880 bfd_size_type dynsymcount; 1881 struct sunos_link_hash_entry *h; 1882 asection *s; 1883 size_t bucketcount; 1884 bfd_size_type hashalloc; 1885 size_t i; 1886 bfd *sub; 1887 1888 *sdynptr = NULL; 1889 *sneedptr = NULL; 1890 *srulesptr = NULL; 1891 1892 if (info->relocatable) 1893 return TRUE; 1894 1895 if (output_bfd->xvec != &MY(vec)) 1896 return TRUE; 1897 1898 /* Look through all the input BFD's and read their relocs. It would 1899 be better if we didn't have to do this, but there is no other way 1900 to determine the number of dynamic relocs we need, and, more 1901 importantly, there is no other way to know which symbols should 1902 get an entry in the procedure linkage table. */ 1903 for (sub = info->input_bfds; sub != NULL; sub = sub->link_next) 1904 { 1905 if ((sub->flags & DYNAMIC) == 0 1906 && sub->xvec == output_bfd->xvec) 1907 { 1908 if (! sunos_scan_relocs (info, sub, obj_textsec (sub), 1909 exec_hdr (sub)->a_trsize) 1910 || ! sunos_scan_relocs (info, sub, obj_datasec (sub), 1911 exec_hdr (sub)->a_drsize)) 1912 return FALSE; 1913 } 1914 } 1915 1916 dynobj = sunos_hash_table (info)->dynobj; 1917 dynsymcount = sunos_hash_table (info)->dynsymcount; 1918 1919 /* If there were no dynamic objects in the link, and we don't need 1920 to build a global offset table, there is nothing to do here. */ 1921 if (! sunos_hash_table (info)->dynamic_sections_needed 1922 && ! sunos_hash_table (info)->got_needed) 1923 return TRUE; 1924 1925 /* If __GLOBAL_OFFSET_TABLE_ was mentioned, define it. */ 1926 h = sunos_link_hash_lookup (sunos_hash_table (info), 1927 "__GLOBAL_OFFSET_TABLE_", FALSE, FALSE, FALSE); 1928 if (h != NULL && (h->flags & SUNOS_REF_REGULAR) != 0) 1929 { 1930 h->flags |= SUNOS_DEF_REGULAR; 1931 if (h->dynindx == -1) 1932 { 1933 ++sunos_hash_table (info)->dynsymcount; 1934 h->dynindx = -2; 1935 } 1936 h->root.root.type = bfd_link_hash_defined; 1937 h->root.root.u.def.section = bfd_get_section_by_name (dynobj, ".got"); 1938 1939 /* If the .got section is more than 0x1000 bytes, we set 1940 __GLOBAL_OFFSET_TABLE_ to be 0x1000 bytes into the section, 1941 so that 13 bit relocations have a greater chance of working. */ 1942 s = bfd_get_section_by_name (dynobj, ".got"); 1943 BFD_ASSERT (s != NULL); 1944 if (s->size >= 0x1000) 1945 h->root.root.u.def.value = 0x1000; 1946 else 1947 h->root.root.u.def.value = 0; 1948 1949 sunos_hash_table (info)->got_base = h->root.root.u.def.value; 1950 } 1951 1952 /* If there are any shared objects in the link, then we need to set 1953 up the dynamic linking information. */ 1954 if (sunos_hash_table (info)->dynamic_sections_needed) 1955 { 1956 *sdynptr = bfd_get_section_by_name (dynobj, ".dynamic"); 1957 1958 /* The .dynamic section is always the same size. */ 1959 s = *sdynptr; 1960 BFD_ASSERT (s != NULL); 1961 s->size = (sizeof (struct external_sun4_dynamic) 1962 + EXTERNAL_SUN4_DYNAMIC_DEBUGGER_SIZE 1963 + sizeof (struct external_sun4_dynamic_link)); 1964 1965 /* Set the size of the .dynsym and .hash sections. We counted 1966 the number of dynamic symbols as we read the input files. We 1967 will build the dynamic symbol table (.dynsym) and the hash 1968 table (.hash) when we build the final symbol table, because 1969 until then we do not know the correct value to give the 1970 symbols. We build the dynamic symbol string table (.dynstr) 1971 in a traversal of the symbol table using 1972 sunos_scan_dynamic_symbol. */ 1973 s = bfd_get_section_by_name (dynobj, ".dynsym"); 1974 BFD_ASSERT (s != NULL); 1975 s->size = dynsymcount * sizeof (struct external_nlist); 1976 s->contents = bfd_alloc (output_bfd, s->size); 1977 if (s->contents == NULL && s->size != 0) 1978 return FALSE; 1979 1980 /* The number of buckets is just the number of symbols divided 1981 by four. To compute the final size of the hash table, we 1982 must actually compute the hash table. Normally we need 1983 exactly as many entries in the hash table as there are 1984 dynamic symbols, but if some of the buckets are not used we 1985 will need additional entries. In the worst case, every 1986 symbol will hash to the same bucket, and we will need 1987 BUCKETCOUNT - 1 extra entries. */ 1988 if (dynsymcount >= 4) 1989 bucketcount = dynsymcount / 4; 1990 else if (dynsymcount > 0) 1991 bucketcount = dynsymcount; 1992 else 1993 bucketcount = 1; 1994 s = bfd_get_section_by_name (dynobj, ".hash"); 1995 BFD_ASSERT (s != NULL); 1996 hashalloc = (dynsymcount + bucketcount - 1) * HASH_ENTRY_SIZE; 1997 s->contents = bfd_zalloc (dynobj, hashalloc); 1998 if (s->contents == NULL && dynsymcount > 0) 1999 return FALSE; 2000 for (i = 0; i < bucketcount; i++) 2001 PUT_WORD (output_bfd, (bfd_vma) -1, s->contents + i * HASH_ENTRY_SIZE); 2002 s->size = bucketcount * HASH_ENTRY_SIZE; 2003 2004 sunos_hash_table (info)->bucketcount = bucketcount; 2005 2006 /* Scan all the symbols, place them in the dynamic symbol table, 2007 and build the dynamic hash table. We reuse dynsymcount as a 2008 counter for the number of symbols we have added so far. */ 2009 sunos_hash_table (info)->dynsymcount = 0; 2010 sunos_link_hash_traverse (sunos_hash_table (info), 2011 sunos_scan_dynamic_symbol, 2012 (void *) info); 2013 BFD_ASSERT (sunos_hash_table (info)->dynsymcount == dynsymcount); 2014 2015 /* The SunOS native linker seems to align the total size of the 2016 symbol strings to a multiple of 8. I don't know if this is 2017 important, but it can't hurt much. */ 2018 s = bfd_get_section_by_name (dynobj, ".dynstr"); 2019 BFD_ASSERT (s != NULL); 2020 if ((s->size & 7) != 0) 2021 { 2022 bfd_size_type add; 2023 bfd_byte *contents; 2024 2025 add = 8 - (s->size & 7); 2026 contents = bfd_realloc (s->contents, s->size + add); 2027 if (contents == NULL) 2028 return FALSE; 2029 memset (contents + s->size, 0, (size_t) add); 2030 s->contents = contents; 2031 s->size += add; 2032 } 2033 } 2034 2035 /* Now that we have worked out the sizes of the procedure linkage 2036 table and the dynamic relocs, allocate storage for them. */ 2037 s = bfd_get_section_by_name (dynobj, ".plt"); 2038 BFD_ASSERT (s != NULL); 2039 if (s->size != 0) 2040 { 2041 s->contents = bfd_alloc (dynobj, s->size); 2042 if (s->contents == NULL) 2043 return FALSE; 2044 2045 /* Fill in the first entry in the table. */ 2046 switch (bfd_get_arch (dynobj)) 2047 { 2048 case bfd_arch_sparc: 2049 memcpy (s->contents, sparc_plt_first_entry, SPARC_PLT_ENTRY_SIZE); 2050 break; 2051 2052 case bfd_arch_m68k: 2053 memcpy (s->contents, m68k_plt_first_entry, M68K_PLT_ENTRY_SIZE); 2054 break; 2055 2056 default: 2057 abort (); 2058 } 2059 } 2060 2061 s = bfd_get_section_by_name (dynobj, ".dynrel"); 2062 if (s->size != 0) 2063 { 2064 s->contents = bfd_alloc (dynobj, s->size); 2065 if (s->contents == NULL) 2066 return FALSE; 2067 } 2068 /* We use the reloc_count field to keep track of how many of the 2069 relocs we have output so far. */ 2070 s->reloc_count = 0; 2071 2072 /* Make space for the global offset table. */ 2073 s = bfd_get_section_by_name (dynobj, ".got"); 2074 s->contents = bfd_alloc (dynobj, s->size); 2075 if (s->contents == NULL) 2076 return FALSE; 2077 2078 *sneedptr = bfd_get_section_by_name (dynobj, ".need"); 2079 *srulesptr = bfd_get_section_by_name (dynobj, ".rules"); 2080 2081 return TRUE; 2082} 2083 2084/* Link a dynamic object. We actually don't have anything to do at 2085 this point. This entry point exists to prevent the regular linker 2086 code from doing anything with the object. */ 2087 2088static bfd_boolean 2089sunos_link_dynamic_object (struct bfd_link_info *info ATTRIBUTE_UNUSED, 2090 bfd *abfd ATTRIBUTE_UNUSED) 2091{ 2092 return TRUE; 2093} 2094 2095/* Write out a dynamic symbol. This is called by the final traversal 2096 over the symbol table. */ 2097 2098static bfd_boolean 2099sunos_write_dynamic_symbol (bfd *output_bfd, 2100 struct bfd_link_info *info, 2101 struct aout_link_hash_entry *harg) 2102{ 2103 struct sunos_link_hash_entry *h = (struct sunos_link_hash_entry *) harg; 2104 int type; 2105 bfd_vma val; 2106 asection *s; 2107 struct external_nlist *outsym; 2108 2109 /* If this symbol is in the procedure linkage table, fill in the 2110 table entry. */ 2111 if (h->plt_offset != 0) 2112 { 2113 bfd *dynobj; 2114 asection *splt; 2115 bfd_byte *p; 2116 bfd_vma r_address; 2117 2118 dynobj = sunos_hash_table (info)->dynobj; 2119 splt = bfd_get_section_by_name (dynobj, ".plt"); 2120 p = splt->contents + h->plt_offset; 2121 2122 s = bfd_get_section_by_name (dynobj, ".dynrel"); 2123 2124 r_address = (splt->output_section->vma 2125 + splt->output_offset 2126 + h->plt_offset); 2127 2128 switch (bfd_get_arch (output_bfd)) 2129 { 2130 case bfd_arch_sparc: 2131 if (info->shared || (h->flags & SUNOS_DEF_REGULAR) == 0) 2132 { 2133 bfd_put_32 (output_bfd, SPARC_PLT_ENTRY_WORD0, p); 2134 bfd_put_32 (output_bfd, 2135 (SPARC_PLT_ENTRY_WORD1 2136 + (((- (h->plt_offset + 4) >> 2) 2137 & 0x3fffffff))), 2138 p + 4); 2139 bfd_put_32 (output_bfd, SPARC_PLT_ENTRY_WORD2 + s->reloc_count, 2140 p + 8); 2141 } 2142 else 2143 { 2144 val = (h->root.root.u.def.section->output_section->vma 2145 + h->root.root.u.def.section->output_offset 2146 + h->root.root.u.def.value); 2147 bfd_put_32 (output_bfd, 2148 SPARC_PLT_PIC_WORD0 + ((val >> 10) & 0x3fffff), 2149 p); 2150 bfd_put_32 (output_bfd, 2151 SPARC_PLT_PIC_WORD1 + (val & 0x3ff), 2152 p + 4); 2153 bfd_put_32 (output_bfd, SPARC_PLT_PIC_WORD2, p + 8); 2154 } 2155 break; 2156 2157 case bfd_arch_m68k: 2158 if (! info->shared && (h->flags & SUNOS_DEF_REGULAR) != 0) 2159 abort (); 2160 bfd_put_16 (output_bfd, M68K_PLT_ENTRY_WORD0, p); 2161 bfd_put_32 (output_bfd, (- (h->plt_offset + 2)), p + 2); 2162 bfd_put_16 (output_bfd, (bfd_vma) s->reloc_count, p + 6); 2163 r_address += 2; 2164 break; 2165 2166 default: 2167 abort (); 2168 } 2169 2170 /* We also need to add a jump table reloc, unless this is the 2171 result of a JMP_TBL reloc from PIC compiled code. */ 2172 if (info->shared || (h->flags & SUNOS_DEF_REGULAR) == 0) 2173 { 2174 BFD_ASSERT (h->dynindx >= 0); 2175 BFD_ASSERT (s->reloc_count * obj_reloc_entry_size (dynobj) 2176 < s->size); 2177 p = s->contents + s->reloc_count * obj_reloc_entry_size (output_bfd); 2178 if (obj_reloc_entry_size (output_bfd) == RELOC_STD_SIZE) 2179 { 2180 struct reloc_std_external *srel; 2181 2182 srel = (struct reloc_std_external *) p; 2183 PUT_WORD (output_bfd, r_address, srel->r_address); 2184 if (bfd_header_big_endian (output_bfd)) 2185 { 2186 srel->r_index[0] = (bfd_byte) (h->dynindx >> 16); 2187 srel->r_index[1] = (bfd_byte) (h->dynindx >> 8); 2188 srel->r_index[2] = (bfd_byte) (h->dynindx); 2189 srel->r_type[0] = (RELOC_STD_BITS_EXTERN_BIG 2190 | RELOC_STD_BITS_JMPTABLE_BIG); 2191 } 2192 else 2193 { 2194 srel->r_index[2] = (bfd_byte) (h->dynindx >> 16); 2195 srel->r_index[1] = (bfd_byte) (h->dynindx >> 8); 2196 srel->r_index[0] = (bfd_byte)h->dynindx; 2197 srel->r_type[0] = (RELOC_STD_BITS_EXTERN_LITTLE 2198 | RELOC_STD_BITS_JMPTABLE_LITTLE); 2199 } 2200 } 2201 else 2202 { 2203 struct reloc_ext_external *erel; 2204 2205 erel = (struct reloc_ext_external *) p; 2206 PUT_WORD (output_bfd, r_address, erel->r_address); 2207 if (bfd_header_big_endian (output_bfd)) 2208 { 2209 erel->r_index[0] = (bfd_byte) (h->dynindx >> 16); 2210 erel->r_index[1] = (bfd_byte) (h->dynindx >> 8); 2211 erel->r_index[2] = (bfd_byte)h->dynindx; 2212 erel->r_type[0] = 2213 (RELOC_EXT_BITS_EXTERN_BIG 2214 | (RELOC_JMP_SLOT << RELOC_EXT_BITS_TYPE_SH_BIG)); 2215 } 2216 else 2217 { 2218 erel->r_index[2] = (bfd_byte) (h->dynindx >> 16); 2219 erel->r_index[1] = (bfd_byte) (h->dynindx >> 8); 2220 erel->r_index[0] = (bfd_byte)h->dynindx; 2221 erel->r_type[0] = 2222 (RELOC_EXT_BITS_EXTERN_LITTLE 2223 | (RELOC_JMP_SLOT << RELOC_EXT_BITS_TYPE_SH_LITTLE)); 2224 } 2225 PUT_WORD (output_bfd, (bfd_vma) 0, erel->r_addend); 2226 } 2227 2228 ++s->reloc_count; 2229 } 2230 } 2231 2232 /* If this is not a dynamic symbol, we don't have to do anything 2233 else. We only check this after handling the PLT entry, because 2234 we can have a PLT entry for a nondynamic symbol when linking PIC 2235 compiled code from a regular object. */ 2236 if (h->dynindx < 0) 2237 return TRUE; 2238 2239 switch (h->root.root.type) 2240 { 2241 default: 2242 case bfd_link_hash_new: 2243 abort (); 2244 /* Avoid variable not initialized warnings. */ 2245 return TRUE; 2246 case bfd_link_hash_undefined: 2247 type = N_UNDF | N_EXT; 2248 val = 0; 2249 break; 2250 case bfd_link_hash_defined: 2251 case bfd_link_hash_defweak: 2252 { 2253 asection *sec; 2254 asection *output_section; 2255 2256 sec = h->root.root.u.def.section; 2257 output_section = sec->output_section; 2258 BFD_ASSERT (bfd_is_abs_section (output_section) 2259 || output_section->owner == output_bfd); 2260 if (h->plt_offset != 0 2261 && (h->flags & SUNOS_DEF_REGULAR) == 0) 2262 { 2263 type = N_UNDF | N_EXT; 2264 val = 0; 2265 } 2266 else 2267 { 2268 if (output_section == obj_textsec (output_bfd)) 2269 type = (h->root.root.type == bfd_link_hash_defined 2270 ? N_TEXT 2271 : N_WEAKT); 2272 else if (output_section == obj_datasec (output_bfd)) 2273 type = (h->root.root.type == bfd_link_hash_defined 2274 ? N_DATA 2275 : N_WEAKD); 2276 else if (output_section == obj_bsssec (output_bfd)) 2277 type = (h->root.root.type == bfd_link_hash_defined 2278 ? N_BSS 2279 : N_WEAKB); 2280 else 2281 type = (h->root.root.type == bfd_link_hash_defined 2282 ? N_ABS 2283 : N_WEAKA); 2284 type |= N_EXT; 2285 val = (h->root.root.u.def.value 2286 + output_section->vma 2287 + sec->output_offset); 2288 } 2289 } 2290 break; 2291 case bfd_link_hash_common: 2292 type = N_UNDF | N_EXT; 2293 val = h->root.root.u.c.size; 2294 break; 2295 case bfd_link_hash_undefweak: 2296 type = N_WEAKU; 2297 val = 0; 2298 break; 2299 case bfd_link_hash_indirect: 2300 case bfd_link_hash_warning: 2301 /* FIXME: Ignore these for now. The circumstances under which 2302 they should be written out are not clear to me. */ 2303 return TRUE; 2304 } 2305 2306 s = bfd_get_section_by_name (sunos_hash_table (info)->dynobj, ".dynsym"); 2307 BFD_ASSERT (s != NULL); 2308 outsym = ((struct external_nlist *) 2309 (s->contents + h->dynindx * EXTERNAL_NLIST_SIZE)); 2310 2311 H_PUT_8 (output_bfd, type, outsym->e_type); 2312 H_PUT_8 (output_bfd, 0, outsym->e_other); 2313 2314 /* FIXME: The native linker doesn't use 0 for desc. It seems to use 2315 one less than the desc value in the shared library, although that 2316 seems unlikely. */ 2317 H_PUT_16 (output_bfd, 0, outsym->e_desc); 2318 2319 PUT_WORD (output_bfd, h->dynstr_index, outsym->e_strx); 2320 PUT_WORD (output_bfd, val, outsym->e_value); 2321 2322 return TRUE; 2323} 2324 2325/* This is called for each reloc against an external symbol. If this 2326 is a reloc which are are going to copy as a dynamic reloc, then 2327 copy it over, and tell the caller to not bother processing this 2328 reloc. */ 2329 2330static bfd_boolean 2331sunos_check_dynamic_reloc (struct bfd_link_info *info, 2332 bfd *input_bfd, 2333 asection *input_section, 2334 struct aout_link_hash_entry *harg, 2335 void * reloc, 2336 bfd_byte *contents ATTRIBUTE_UNUSED, 2337 bfd_boolean *skip, 2338 bfd_vma *relocationp) 2339{ 2340 struct sunos_link_hash_entry *h = (struct sunos_link_hash_entry *) harg; 2341 bfd *dynobj; 2342 bfd_boolean baserel; 2343 bfd_boolean jmptbl; 2344 bfd_boolean pcrel; 2345 asection *s; 2346 bfd_byte *p; 2347 long indx; 2348 2349 *skip = FALSE; 2350 2351 dynobj = sunos_hash_table (info)->dynobj; 2352 2353 if (h != NULL 2354 && h->plt_offset != 0 2355 && (info->shared 2356 || (h->flags & SUNOS_DEF_REGULAR) == 0)) 2357 { 2358 asection *splt; 2359 2360 /* Redirect the relocation to the PLT entry. */ 2361 splt = bfd_get_section_by_name (dynobj, ".plt"); 2362 *relocationp = (splt->output_section->vma 2363 + splt->output_offset 2364 + h->plt_offset); 2365 } 2366 2367 if (obj_reloc_entry_size (input_bfd) == RELOC_STD_SIZE) 2368 { 2369 struct reloc_std_external *srel; 2370 2371 srel = (struct reloc_std_external *) reloc; 2372 if (bfd_header_big_endian (input_bfd)) 2373 { 2374 baserel = (0 != (srel->r_type[0] & RELOC_STD_BITS_BASEREL_BIG)); 2375 jmptbl = (0 != (srel->r_type[0] & RELOC_STD_BITS_JMPTABLE_BIG)); 2376 pcrel = (0 != (srel->r_type[0] & RELOC_STD_BITS_PCREL_BIG)); 2377 } 2378 else 2379 { 2380 baserel = (0 != (srel->r_type[0] & RELOC_STD_BITS_BASEREL_LITTLE)); 2381 jmptbl = (0 != (srel->r_type[0] & RELOC_STD_BITS_JMPTABLE_LITTLE)); 2382 pcrel = (0 != (srel->r_type[0] & RELOC_STD_BITS_PCREL_LITTLE)); 2383 } 2384 } 2385 else 2386 { 2387 struct reloc_ext_external *erel; 2388 int r_type; 2389 2390 erel = (struct reloc_ext_external *) reloc; 2391 if (bfd_header_big_endian (input_bfd)) 2392 r_type = ((erel->r_type[0] & RELOC_EXT_BITS_TYPE_BIG) 2393 >> RELOC_EXT_BITS_TYPE_SH_BIG); 2394 else 2395 r_type = ((erel->r_type[0] & RELOC_EXT_BITS_TYPE_LITTLE) 2396 >> RELOC_EXT_BITS_TYPE_SH_LITTLE); 2397 baserel = (r_type == RELOC_BASE10 2398 || r_type == RELOC_BASE13 2399 || r_type == RELOC_BASE22); 2400 jmptbl = r_type == RELOC_JMP_TBL; 2401 pcrel = (r_type == RELOC_DISP8 2402 || r_type == RELOC_DISP16 2403 || r_type == RELOC_DISP32 2404 || r_type == RELOC_WDISP30 2405 || r_type == RELOC_WDISP22); 2406 /* We don't consider the PC10 and PC22 types to be PC relative, 2407 because they are pcrel_offset. */ 2408 } 2409 2410 if (baserel) 2411 { 2412 bfd_vma *got_offsetp; 2413 asection *sgot; 2414 2415 if (h != NULL) 2416 got_offsetp = &h->got_offset; 2417 else if (adata (input_bfd).local_got_offsets == NULL) 2418 got_offsetp = NULL; 2419 else 2420 { 2421 struct reloc_std_external *srel; 2422 int r_index; 2423 2424 srel = (struct reloc_std_external *) reloc; 2425 if (obj_reloc_entry_size (input_bfd) == RELOC_STD_SIZE) 2426 { 2427 if (bfd_header_big_endian (input_bfd)) 2428 r_index = ((srel->r_index[0] << 16) 2429 | (srel->r_index[1] << 8) 2430 | srel->r_index[2]); 2431 else 2432 r_index = ((srel->r_index[2] << 16) 2433 | (srel->r_index[1] << 8) 2434 | srel->r_index[0]); 2435 } 2436 else 2437 { 2438 struct reloc_ext_external *erel; 2439 2440 erel = (struct reloc_ext_external *) reloc; 2441 if (bfd_header_big_endian (input_bfd)) 2442 r_index = ((erel->r_index[0] << 16) 2443 | (erel->r_index[1] << 8) 2444 | erel->r_index[2]); 2445 else 2446 r_index = ((erel->r_index[2] << 16) 2447 | (erel->r_index[1] << 8) 2448 | erel->r_index[0]); 2449 } 2450 2451 got_offsetp = adata (input_bfd).local_got_offsets + r_index; 2452 } 2453 2454 BFD_ASSERT (got_offsetp != NULL && *got_offsetp != 0); 2455 2456 sgot = bfd_get_section_by_name (dynobj, ".got"); 2457 2458 /* We set the least significant bit to indicate whether we have 2459 already initialized the GOT entry. */ 2460 if ((*got_offsetp & 1) == 0) 2461 { 2462 if (h == NULL 2463 || (! info->shared 2464 && ((h->flags & SUNOS_DEF_DYNAMIC) == 0 2465 || (h->flags & SUNOS_DEF_REGULAR) != 0))) 2466 PUT_WORD (dynobj, *relocationp, sgot->contents + *got_offsetp); 2467 else 2468 PUT_WORD (dynobj, 0, sgot->contents + *got_offsetp); 2469 2470 if (info->shared 2471 || (h != NULL 2472 && (h->flags & SUNOS_DEF_DYNAMIC) != 0 2473 && (h->flags & SUNOS_DEF_REGULAR) == 0)) 2474 { 2475 /* We need to create a GLOB_DAT or 32 reloc to tell the 2476 dynamic linker to fill in this entry in the table. */ 2477 2478 s = bfd_get_section_by_name (dynobj, ".dynrel"); 2479 BFD_ASSERT (s != NULL); 2480 BFD_ASSERT (s->reloc_count * obj_reloc_entry_size (dynobj) 2481 < s->size); 2482 2483 p = (s->contents 2484 + s->reloc_count * obj_reloc_entry_size (dynobj)); 2485 2486 if (h != NULL) 2487 indx = h->dynindx; 2488 else 2489 indx = 0; 2490 2491 if (obj_reloc_entry_size (dynobj) == RELOC_STD_SIZE) 2492 { 2493 struct reloc_std_external *srel; 2494 2495 srel = (struct reloc_std_external *) p; 2496 PUT_WORD (dynobj, 2497 (*got_offsetp 2498 + sgot->output_section->vma 2499 + sgot->output_offset), 2500 srel->r_address); 2501 if (bfd_header_big_endian (dynobj)) 2502 { 2503 srel->r_index[0] = (bfd_byte) (indx >> 16); 2504 srel->r_index[1] = (bfd_byte) (indx >> 8); 2505 srel->r_index[2] = (bfd_byte)indx; 2506 if (h == NULL) 2507 srel->r_type[0] = 2 << RELOC_STD_BITS_LENGTH_SH_BIG; 2508 else 2509 srel->r_type[0] = 2510 (RELOC_STD_BITS_EXTERN_BIG 2511 | RELOC_STD_BITS_BASEREL_BIG 2512 | RELOC_STD_BITS_RELATIVE_BIG 2513 | (2 << RELOC_STD_BITS_LENGTH_SH_BIG)); 2514 } 2515 else 2516 { 2517 srel->r_index[2] = (bfd_byte) (indx >> 16); 2518 srel->r_index[1] = (bfd_byte) (indx >> 8); 2519 srel->r_index[0] = (bfd_byte)indx; 2520 if (h == NULL) 2521 srel->r_type[0] = 2 << RELOC_STD_BITS_LENGTH_SH_LITTLE; 2522 else 2523 srel->r_type[0] = 2524 (RELOC_STD_BITS_EXTERN_LITTLE 2525 | RELOC_STD_BITS_BASEREL_LITTLE 2526 | RELOC_STD_BITS_RELATIVE_LITTLE 2527 | (2 << RELOC_STD_BITS_LENGTH_SH_LITTLE)); 2528 } 2529 } 2530 else 2531 { 2532 struct reloc_ext_external *erel; 2533 2534 erel = (struct reloc_ext_external *) p; 2535 PUT_WORD (dynobj, 2536 (*got_offsetp 2537 + sgot->output_section->vma 2538 + sgot->output_offset), 2539 erel->r_address); 2540 if (bfd_header_big_endian (dynobj)) 2541 { 2542 erel->r_index[0] = (bfd_byte) (indx >> 16); 2543 erel->r_index[1] = (bfd_byte) (indx >> 8); 2544 erel->r_index[2] = (bfd_byte)indx; 2545 if (h == NULL) 2546 erel->r_type[0] = 2547 RELOC_32 << RELOC_EXT_BITS_TYPE_SH_BIG; 2548 else 2549 erel->r_type[0] = 2550 (RELOC_EXT_BITS_EXTERN_BIG 2551 | (RELOC_GLOB_DAT << RELOC_EXT_BITS_TYPE_SH_BIG)); 2552 } 2553 else 2554 { 2555 erel->r_index[2] = (bfd_byte) (indx >> 16); 2556 erel->r_index[1] = (bfd_byte) (indx >> 8); 2557 erel->r_index[0] = (bfd_byte)indx; 2558 if (h == NULL) 2559 erel->r_type[0] = 2560 RELOC_32 << RELOC_EXT_BITS_TYPE_SH_LITTLE; 2561 else 2562 erel->r_type[0] = 2563 (RELOC_EXT_BITS_EXTERN_LITTLE 2564 | (RELOC_GLOB_DAT 2565 << RELOC_EXT_BITS_TYPE_SH_LITTLE)); 2566 } 2567 PUT_WORD (dynobj, 0, erel->r_addend); 2568 } 2569 2570 ++s->reloc_count; 2571 } 2572 2573 *got_offsetp |= 1; 2574 } 2575 2576 *relocationp = (sgot->vma 2577 + (*got_offsetp &~ (bfd_vma) 1) 2578 - sunos_hash_table (info)->got_base); 2579 2580 /* There is nothing else to do for a base relative reloc. */ 2581 return TRUE; 2582 } 2583 2584 if (! sunos_hash_table (info)->dynamic_sections_needed) 2585 return TRUE; 2586 if (! info->shared) 2587 { 2588 if (h == NULL 2589 || h->dynindx == -1 2590 || h->root.root.type != bfd_link_hash_undefined 2591 || (h->flags & SUNOS_DEF_REGULAR) != 0 2592 || (h->flags & SUNOS_DEF_DYNAMIC) == 0 2593 || (h->root.root.u.undef.abfd->flags & DYNAMIC) == 0) 2594 return TRUE; 2595 } 2596 else 2597 { 2598 if (h != NULL 2599 && (h->dynindx == -1 2600 || jmptbl 2601 || strcmp (h->root.root.root.string, 2602 "__GLOBAL_OFFSET_TABLE_") == 0)) 2603 return TRUE; 2604 } 2605 2606 /* It looks like this is a reloc we are supposed to copy. */ 2607 2608 s = bfd_get_section_by_name (dynobj, ".dynrel"); 2609 BFD_ASSERT (s != NULL); 2610 BFD_ASSERT (s->reloc_count * obj_reloc_entry_size (dynobj) < s->size); 2611 2612 p = s->contents + s->reloc_count * obj_reloc_entry_size (dynobj); 2613 2614 /* Copy the reloc over. */ 2615 memcpy (p, reloc, obj_reloc_entry_size (dynobj)); 2616 2617 if (h != NULL) 2618 indx = h->dynindx; 2619 else 2620 indx = 0; 2621 2622 /* Adjust the address and symbol index. */ 2623 if (obj_reloc_entry_size (dynobj) == RELOC_STD_SIZE) 2624 { 2625 struct reloc_std_external *srel; 2626 2627 srel = (struct reloc_std_external *) p; 2628 PUT_WORD (dynobj, 2629 (GET_WORD (dynobj, srel->r_address) 2630 + input_section->output_section->vma 2631 + input_section->output_offset), 2632 srel->r_address); 2633 if (bfd_header_big_endian (dynobj)) 2634 { 2635 srel->r_index[0] = (bfd_byte) (indx >> 16); 2636 srel->r_index[1] = (bfd_byte) (indx >> 8); 2637 srel->r_index[2] = (bfd_byte)indx; 2638 } 2639 else 2640 { 2641 srel->r_index[2] = (bfd_byte) (indx >> 16); 2642 srel->r_index[1] = (bfd_byte) (indx >> 8); 2643 srel->r_index[0] = (bfd_byte)indx; 2644 } 2645 /* FIXME: We may have to change the addend for a PC relative 2646 reloc. */ 2647 } 2648 else 2649 { 2650 struct reloc_ext_external *erel; 2651 2652 erel = (struct reloc_ext_external *) p; 2653 PUT_WORD (dynobj, 2654 (GET_WORD (dynobj, erel->r_address) 2655 + input_section->output_section->vma 2656 + input_section->output_offset), 2657 erel->r_address); 2658 if (bfd_header_big_endian (dynobj)) 2659 { 2660 erel->r_index[0] = (bfd_byte) (indx >> 16); 2661 erel->r_index[1] = (bfd_byte) (indx >> 8); 2662 erel->r_index[2] = (bfd_byte)indx; 2663 } 2664 else 2665 { 2666 erel->r_index[2] = (bfd_byte) (indx >> 16); 2667 erel->r_index[1] = (bfd_byte) (indx >> 8); 2668 erel->r_index[0] = (bfd_byte)indx; 2669 } 2670 if (pcrel && h != NULL) 2671 { 2672 /* Adjust the addend for the change in address. */ 2673 PUT_WORD (dynobj, 2674 (GET_WORD (dynobj, erel->r_addend) 2675 - (input_section->output_section->vma 2676 + input_section->output_offset 2677 - input_section->vma)), 2678 erel->r_addend); 2679 } 2680 } 2681 2682 ++s->reloc_count; 2683 2684 if (h != NULL) 2685 *skip = TRUE; 2686 2687 return TRUE; 2688} 2689 2690/* Finish up the dynamic linking information. */ 2691 2692static bfd_boolean 2693sunos_finish_dynamic_link (bfd *abfd, struct bfd_link_info *info) 2694{ 2695 bfd *dynobj; 2696 asection *o; 2697 asection *s; 2698 asection *sdyn; 2699 2700 if (! sunos_hash_table (info)->dynamic_sections_needed 2701 && ! sunos_hash_table (info)->got_needed) 2702 return TRUE; 2703 2704 dynobj = sunos_hash_table (info)->dynobj; 2705 2706 sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); 2707 BFD_ASSERT (sdyn != NULL); 2708 2709 /* Finish up the .need section. The linker emulation code filled it 2710 in, but with offsets from the start of the section instead of 2711 real addresses. Now that we know the section location, we can 2712 fill in the final values. */ 2713 s = bfd_get_section_by_name (dynobj, ".need"); 2714 if (s != NULL && s->size != 0) 2715 { 2716 file_ptr filepos; 2717 bfd_byte *p; 2718 2719 filepos = s->output_section->filepos + s->output_offset; 2720 p = s->contents; 2721 while (1) 2722 { 2723 bfd_vma val; 2724 2725 PUT_WORD (dynobj, GET_WORD (dynobj, p) + filepos, p); 2726 val = GET_WORD (dynobj, p + 12); 2727 if (val == 0) 2728 break; 2729 PUT_WORD (dynobj, val + filepos, p + 12); 2730 p += 16; 2731 } 2732 } 2733 2734 /* The first entry in the .got section is the address of the 2735 dynamic information, unless this is a shared library. */ 2736 s = bfd_get_section_by_name (dynobj, ".got"); 2737 BFD_ASSERT (s != NULL); 2738 if (info->shared || sdyn->size == 0) 2739 PUT_WORD (dynobj, 0, s->contents); 2740 else 2741 PUT_WORD (dynobj, sdyn->output_section->vma + sdyn->output_offset, 2742 s->contents); 2743 2744 for (o = dynobj->sections; o != NULL; o = o->next) 2745 { 2746 if ((o->flags & SEC_HAS_CONTENTS) != 0 2747 && o->contents != NULL) 2748 { 2749 BFD_ASSERT (o->output_section != NULL 2750 && o->output_section->owner == abfd); 2751 if (! bfd_set_section_contents (abfd, o->output_section, 2752 o->contents, 2753 (file_ptr) o->output_offset, 2754 o->size)) 2755 return FALSE; 2756 } 2757 } 2758 2759 if (sdyn->size > 0) 2760 { 2761 struct external_sun4_dynamic esd; 2762 struct external_sun4_dynamic_link esdl; 2763 file_ptr pos; 2764 2765 /* Finish up the dynamic link information. */ 2766 PUT_WORD (dynobj, (bfd_vma) 3, esd.ld_version); 2767 PUT_WORD (dynobj, 2768 sdyn->output_section->vma + sdyn->output_offset + sizeof esd, 2769 esd.ldd); 2770 PUT_WORD (dynobj, 2771 (sdyn->output_section->vma 2772 + sdyn->output_offset 2773 + sizeof esd 2774 + EXTERNAL_SUN4_DYNAMIC_DEBUGGER_SIZE), 2775 esd.ld); 2776 2777 if (! bfd_set_section_contents (abfd, sdyn->output_section, &esd, 2778 (file_ptr) sdyn->output_offset, 2779 (bfd_size_type) sizeof esd)) 2780 return FALSE; 2781 2782 PUT_WORD (dynobj, (bfd_vma) 0, esdl.ld_loaded); 2783 2784 s = bfd_get_section_by_name (dynobj, ".need"); 2785 if (s == NULL || s->size == 0) 2786 PUT_WORD (dynobj, (bfd_vma) 0, esdl.ld_need); 2787 else 2788 PUT_WORD (dynobj, s->output_section->filepos + s->output_offset, 2789 esdl.ld_need); 2790 2791 s = bfd_get_section_by_name (dynobj, ".rules"); 2792 if (s == NULL || s->size == 0) 2793 PUT_WORD (dynobj, (bfd_vma) 0, esdl.ld_rules); 2794 else 2795 PUT_WORD (dynobj, s->output_section->filepos + s->output_offset, 2796 esdl.ld_rules); 2797 2798 s = bfd_get_section_by_name (dynobj, ".got"); 2799 BFD_ASSERT (s != NULL); 2800 PUT_WORD (dynobj, s->output_section->vma + s->output_offset, 2801 esdl.ld_got); 2802 2803 s = bfd_get_section_by_name (dynobj, ".plt"); 2804 BFD_ASSERT (s != NULL); 2805 PUT_WORD (dynobj, s->output_section->vma + s->output_offset, 2806 esdl.ld_plt); 2807 PUT_WORD (dynobj, s->size, esdl.ld_plt_sz); 2808 2809 s = bfd_get_section_by_name (dynobj, ".dynrel"); 2810 BFD_ASSERT (s != NULL); 2811 BFD_ASSERT (s->reloc_count * obj_reloc_entry_size (dynobj) 2812 == s->size); 2813 PUT_WORD (dynobj, s->output_section->filepos + s->output_offset, 2814 esdl.ld_rel); 2815 2816 s = bfd_get_section_by_name (dynobj, ".hash"); 2817 BFD_ASSERT (s != NULL); 2818 PUT_WORD (dynobj, s->output_section->filepos + s->output_offset, 2819 esdl.ld_hash); 2820 2821 s = bfd_get_section_by_name (dynobj, ".dynsym"); 2822 BFD_ASSERT (s != NULL); 2823 PUT_WORD (dynobj, s->output_section->filepos + s->output_offset, 2824 esdl.ld_stab); 2825 2826 PUT_WORD (dynobj, (bfd_vma) 0, esdl.ld_stab_hash); 2827 2828 PUT_WORD (dynobj, (bfd_vma) sunos_hash_table (info)->bucketcount, 2829 esdl.ld_buckets); 2830 2831 s = bfd_get_section_by_name (dynobj, ".dynstr"); 2832 BFD_ASSERT (s != NULL); 2833 PUT_WORD (dynobj, s->output_section->filepos + s->output_offset, 2834 esdl.ld_symbols); 2835 PUT_WORD (dynobj, s->size, esdl.ld_symb_size); 2836 2837 /* The size of the text area is the size of the .text section 2838 rounded up to a page boundary. FIXME: Should the page size be 2839 conditional on something? */ 2840 PUT_WORD (dynobj, 2841 BFD_ALIGN (obj_textsec (abfd)->size, 0x2000), 2842 esdl.ld_text); 2843 2844 pos = sdyn->output_offset; 2845 pos += sizeof esd + EXTERNAL_SUN4_DYNAMIC_DEBUGGER_SIZE; 2846 if (! bfd_set_section_contents (abfd, sdyn->output_section, &esdl, 2847 pos, (bfd_size_type) sizeof esdl)) 2848 return FALSE; 2849 2850 abfd->flags |= DYNAMIC; 2851 } 2852 2853 return TRUE; 2854} 2855